Unfortunately, older machines get to the point where they can only be used for word processing (and old games), becasue everything else is too intensive, even web browsing with most of the newer browsers and systems. I hate throwing out technology, becasue 1) I know that I will probably need it in a while for something, anything (hence the reason I have a 1gb hard drive in my basement - you can't even install windows on that anymore) and 2) someone else could probably still use it. I upgraded our old computer with bits and pieces that I found in the dump near our cottage, bringing it up from 32 to 96mb of ram, but I never looked for a processor upgrade (it was a p200 w/mmx)
Yeah, I know how that is. I have my old 486 desktop still in the garage. I always thought that someday I'd need it. I was wrong.
The good thing about keyboards is that they're almost timeless. All you need is a PS2, AT, or USB adapter and you're back in business. I'm using my M13 keyboard hooked up to the dock on a T60. FYI, the dock has a combined PS2 port for a mouse and keyboard. I bought a splitter (IBM specific) and it works great. Amazing how you can plug in a 15 or so year old piece of equipment into a modern machine and have it work.