They're all operational, running Debian GNU/Linux Lenny/Sid. They all have their memory pretty much maxed out, harddisks are unfortunately still mostly original/old. They work but some are pretty slow and/or produce quite some noise.
The 760 is a 760cd, it has video in/out and I have the necessary cable. Running Linux it's not possible to get that working unfortunately, it is also the only machine that doesn't have working sound under Linux. Getting sound to work on the 560x and 600 was pretty hellish, there are multiple non-working solutions posted online, gentoo-forums had the correct solution.
I do have both hibernate and suspend working on all machines, took me more than one all-nighter to enable hibernation on the 760cd: the hibernation partition needs to be FAT32 (multiple online resources claim FAT16 should work too), if you have a 4GB hd like mine the partition needs to be at the start of the disk, it only works if you're working on battery power (I'd like to ask a few question to the engineer at IBM who made that up) and you need to have APM working in Linux. Oh, and you need IBM's DOS-tool to create the hibernation file on the partiton of course.
All machines have working wireless, I got a few 16-bit cards for postage from someone at another forum.
Only a few machines have usable batteries, that does include the 701c however.
I know people here could identify the machines from this pic. The 600's are are 600 and a 600x, there is a difference if you look at the air vent. The 570's are a 570 and a 570e, I don't think that is possible to tell from this pic.
My homebrew battery (clickable), good for 2.5 hours operation.
Howto
here (scroll down).