I have a second HD, which has over 190GB free, and I've transfered as many files as I can to that, but the problem keeps happening. At the moment, I'm blessed with 185MB so at least I can open programmes.
I recently added another user, partitioning the drive, and wondered, might this has anything to do with it?
I'm also thinking of increasing the RAM (hopefully, one day, I'll update the OSX too!): can I take out the 256 and replace it with two 512s?
(Is there an eMac community out there? I couldn't find one via the LJ search.)