Sony Vaio VGN-X and T2/Linux
The Sony Vaio VGN-XP is a very slim, lightweight and stylish, however "very expensive" sub-notebook that just weights less than 1kg.
Notes
Suspend to RAM did not came back properly on a test machine - though it might with some VBE re-POST glue.
/proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU Z540 @ 1.86GHz
stepping : 2
cpu MHz : 1866.641
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 xtpr lahf_lm
bogomips : 3736.29
clflush size : 64
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU Z540 @ 1.86GHz
stepping : 2
cpu MHz : 1866.641
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 xtpr lahf_lm
bogomips : 3733.45
clflush size : 64
power management:
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU Z540 @ 1.86GHz
stepping : 2
cpu MHz : 1866.641
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 xtpr lahf_lm
bogomips : 3736.29
clflush size : 64
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU Z540 @ 1.86GHz
stepping : 2
cpu MHz : 1866.641
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx est tm2 ssse3 xtpr lahf_lm
bogomips : 3733.45
clflush size : 64
power management:
lspci
0000:00:00.0 Host bridge: Intel Corp.: Unknown device 8100 (rev 06)
0000:00:02.0 VGA compatible controller: Intel Corp.: Unknown device 8108 (rev 06)
0000:00:1b.0 Class 0403: Intel Corp.: Unknown device 811b (rev 06)
0000:00:1c.0 PCI bridge: Intel Corp.: Unknown device 8110 (rev 06)
0000:00:1c.1 PCI bridge: Intel Corp.: Unknown device 8112 (rev 06)
0000:00:1d.0 USB Controller: Intel Corp.: Unknown device 8114 (rev 06)
0000:00:1d.1 USB Controller: Intel Corp.: Unknown device 8115 (rev 06)
0000:00:1d.2 USB Controller: Intel Corp.: Unknown device 8116 (rev 06)
0000:00:1d.7 USB Controller: Intel Corp.: Unknown device 8117 (rev 06)
0000:00:1f.0 ISA bridge: Intel Corp.: Unknown device 8119 (rev 06)
0000:00:1f.1 IDE interface: Intel Corp.: Unknown device 811a (rev 06)
0000:01:00.0 Network controller: Atheros Communications, Inc.: Unknown device 002b (rev 01)
0000:02:00.0 Ethernet controller: Marvell Technology Group Ltd.: Unknown device 4380 (rev 10)
0000:00:02.0 VGA compatible controller: Intel Corp.: Unknown device 8108 (rev 06)
0000:00:1b.0 Class 0403: Intel Corp.: Unknown device 811b (rev 06)
0000:00:1c.0 PCI bridge: Intel Corp.: Unknown device 8110 (rev 06)
0000:00:1c.1 PCI bridge: Intel Corp.: Unknown device 8112 (rev 06)
0000:00:1d.0 USB Controller: Intel Corp.: Unknown device 8114 (rev 06)
0000:00:1d.1 USB Controller: Intel Corp.: Unknown device 8115 (rev 06)
0000:00:1d.2 USB Controller: Intel Corp.: Unknown device 8116 (rev 06)
0000:00:1d.7 USB Controller: Intel Corp.: Unknown device 8117 (rev 06)
0000:00:1f.0 ISA bridge: Intel Corp.: Unknown device 8119 (rev 06)
0000:00:1f.1 IDE interface: Intel Corp.: Unknown device 811a (rev 06)
0000:01:00.0 Network controller: Atheros Communications, Inc.: Unknown device 002b (rev 01)
0000:02:00.0 Ethernet controller: Marvell Technology Group Ltd.: Unknown device 4380 (rev 10)
lsusb
Bus 004 Device 003: ID 05ca:18b6 Ricoh Company Ltd.
Bus 004 Device 001: ID 1d6b:0002
Bus 003 Device 001: ID 1d6b:0001
Bus 002 Device 001: ID 1d6b:0001
Bus 001 Device 001: ID 1d6b:0001
Bus 004 Device 001: ID 1d6b:0002
Bus 003 Device 001: ID 1d6b:0001
Bus 002 Device 001: ID 1d6b:0001
Bus 001 Device 001: ID 1d6b:0001