X terminal distributions?

[Duane Attaway]

I have several old laptops that could live a good life of xterminals. 
Unfortunately, some don't have hard drives, most have memory less than 
64MB, and one is a 486 with 4MB.  All can use a pcmcia ethernet card.

What do most people do with these?  Are there distributions catering to 
these or do I have to build them myself?

I'd hate throw them away.  They use so little power, have well designed 
hardware, and look nice.