[TriLUG] Minimum usable laptop memory for linux (was: Comments on "IBM Certified Used" equipment?)

[Rick DeNatale]

All this talk of laptops prompts me to ask a question.

I've got a surplus Thinkpad (A21e) which currently has 64MB of RAM.  I
installed FC3 on it and it boots, but runs out of memory, if I try to
run an application or two.  Is it worth it to add more memory?  The
max this little puppy can hold is 256MB, it has two sockets for either
64MB or 128MB PC100 SODIMMs.

Would adding 128MB to get 192MB be reasonable?  If not would replacing
the existing module with two 128MB modules to get 256MB be acceptable?
 Anyone know where I can get these modules cheap?