A truly great job you did Stephanie. 64Mb is the maximum of memory possible for the a320 or theorically you could increase to 128mb or even more?
I believe 128MB is possible, I've found a ram chip that appears to be compatible. It'd require a new SPL and new Dingux to take advantage of the added memory. The downside is a pair of these chips would cost almost as much as a 320, so not sure it's actually worth it. I have investigated the possibility though.
I wish I could be as useful and cool as you.
Can you put the 330 LCD in there too? Maybe the shoulder buttons too, somehow?
A screen swap would be easy compared to the memory chip hack. My white 320 doesn't need it though, it has a great screen. Bright and sharp, easily as good as the 330.
Re. the shoulder buttons, if the 320's shoulder buttons were a bit bigger that might help. You couldn't really move the microswitches but a case mod & bigger buttons might make them easier to use.