X terminal distributions?

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.