All thinkpads have a Wifi card whitelist at the BIOS level that prevent installing certain WiFi cards. The restriction can be bypassed with a BIOS modification: either installing Libreboot, Coreboot or editing the official Lenovo/IBM BIOS.

lspci -vnnmm

Slot:	00:00.0
Class:	Host bridge [0600]
Vendor:	Intel Corporation [8086]
Device:	Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller [2590]
SVendor:	IBM [1014]
SDevice:	ThinkPad Z60t [0575]
Rev:	03

Slot:	00:01.0
Class:	PCI bridge [0604]
Vendor:	Intel Corporation [8086]
Device:	Mobile 915GM/PM Express PCI Express Root Port [2591]
Rev:	03

Slot:	00:1c.0
Class:	PCI bridge [0604]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 1 [2660]
Rev:	03

Slot:	00:1c.2
Class:	PCI bridge [0604]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 3 [2664]
Rev:	03

Slot:	00:1d.0
Class:	USB controller [0c03]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 [2658]
SVendor:	IBM [1014]
SDevice:	Device [0565]
Rev:	03

Slot:	00:1d.1
Class:	USB controller [0c03]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 [2659]
SVendor:	IBM [1014]
SDevice:	Device [0565]
Rev:	03

Slot:	00:1d.2
Class:	USB controller [0c03]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 [265a]
SVendor:	IBM [1014]
SDevice:	Device [0565]
Rev:	03

Slot:	00:1d.3
Class:	USB controller [0c03]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 [265b]
SVendor:	IBM [1014]
SDevice:	Device [0565]
Rev:	03

Slot:	00:1d.7
Class:	USB controller [0c03]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller [265c]
SVendor:	IBM [1014]
SDevice:	Device [0566]
Rev:	03
ProgIf:	20

Slot:	00:1e.0
Class:	PCI bridge [0604]
Vendor:	Intel Corporation [8086]
Device:	82801 Mobile PCI Bridge [2448]
Rev:	d3
ProgIf:	01

Slot:	00:1e.2
Class:	Multimedia audio controller [0401]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller [266e]
SVendor:	IBM [1014]
SDevice:	Device [0567]
Rev:	03

Slot:	00:1e.3
Class:	Modem [0703]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Modem Controller [266d]
SVendor:	IBM [1014]
SDevice:	Device [0574]
Rev:	03

Slot:	00:1f.0
Class:	ISA bridge [0601]
Vendor:	Intel Corporation [8086]
Device:	82801FBM (ICH6M) LPC Interface Bridge [2641]
SVendor:	IBM [1014]
SDevice:	Device [0568]
Rev:	03

Slot:	00:1f.2
Class:	IDE interface [0101]
Vendor:	Intel Corporation [8086]
Device:	82801FBM (ICH6M) SATA Controller [2653]
SVendor:	IBM [1014]
SDevice:	Device [056a]
Rev:	03
ProgIf:	80

Slot:	00:1f.3
Class:	SMBus [0c05]
Vendor:	Intel Corporation [8086]
Device:	82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus Controller [266a]
SVendor:	IBM [1014]
SDevice:	Device [056b]
Rev:	03

Slot:	01:00.0
Class:	VGA compatible controller [0300]
Vendor:	Advanced Micro Devices [AMD] nee ATI [1002]
Device:	RV370 [Mobility Radeon X300] [5460]
SVendor:	IBM [1014]
SDevice:	Device [056e]

Slot:	02:00.0
Class:	Ethernet controller [0200]
Vendor:	Broadcom Corporation [14e4]
Device:	NetXtreme BCM5751M Gigabit Ethernet PCI Express [167d]
SVendor:	IBM [1014]
SDevice:	ThinkPad Z60t [0577]
Rev:	11

Slot:	0b:00.0
Class:	CardBus bridge [0607]
Vendor:	Ricoh Co Ltd [1180]
Device:	RL5c476 II [0476]
SVendor:	IBM [1014]
SDevice:	ThinkPad Z60t [056c]
Rev:	8d

Slot:	0b:02.0
Class:	Network controller [0280]
Vendor:	Intel Corporation [8086]
Device:	PRO/Wireless 2915ABG [Calexico2] Network Connection [4224]
SVendor:	Intel Corporation [8086]
SDevice:	Device [1011]
Rev:	05