Today I installed a 1GB ram chip I got from newegg.com. The brand name is PQI and it works great and it is the cheapest price I've seen around. If you need more ram, this is the place to get it.
http://www.newegg.com/app/ViewProductDesc.asp?description=20-141-198&depa=1
Model # MD441GUOE
http://www.newegg.com/app/ViewProductDesc.asp?description=20-141-198&depa=1
Model # MD441GUOE