For the Sager 8882 and 8887, we have cataloged what works in our installation and what doesn't:

TV Tuner works
Detachable mp3 player works (mp3 player bay tested)
Built-in 10/100 network works
USB 2.0 works (USB1.1 device tested)
CD burning works
DVD movie playback works (Xine must be updated with DVD support)
PCMCIA controller works
Built-in Audio works (headphone out works. Line-in, mic-in, and digital out untested)
Floppy drive works
Serial port works
Parallel port works
ACPI somewhat (suspend to disk available on command or when closing lid - not enabled by default; Battery info is reported; buttons on front and behind keyboard do not work due to lack of support in Accelerated X)
v.90 Smartlink modem
(winmodem)
Does not work (The Smartlink drivers do not compile due to unresolved symbols using the Mandrake kernel source. There are reports that it will work with a vanilla kernel)
Sony MemoryStick slot Does not work (Device does not appear in lspci)
1394 Firewire Does not work (Driver crashes when used)
Built-in 802.11b

Does not work (uses a Broadcom BCM4301KPF chip which does not appear to have linux drivers)
http://www.petitiononline.com/BCM4301/

FiR/IrDA Infrared untested