Corsair has 256 meg sticks of PC-150 CAS-2 on sale for $100 at several vendors. I just ordered a 256 meg module of Kingmax TinyBGA PC-150 for under $120 shipped. Yep, memory prices are low, good time o buy.
Mr. Spud Cranium, if you're really serious about getting the i815 mobo, email me. I'm seriously thinking of upgrading to Abit SA6R or VP6 and if so, I'll have a good Abit SE6 (with nice cooling mods) that might need a home. I'm assuming you can use all 3 DIMM slots, although personally, I've never had more than one stick in it at a time. However, the manual says you can "populate" any of the slots with any size RAM modules up to 512 meg.