Well, after some serious searching, I may have found a source for loose SDRAM for the upgrade.
is the URL. I registered (free) and did an RFQ (request for quote) on the above memory chip (the chips on my rev 1.2 board). Their online stock shows 2000 pcs in stock, and I did an RFQ for 10 pcs (In comments I said for prototyping...).
If it pans out, I'd be looking for 3-4 ppl willing/wanting to get 2 chips for themselves, and it could be made into a true group buy if more show interest. Please don't reply with the ME TOO's until I hear back if a smaller quantity is available and for a decent price. We could even make it into a true group buy by including some 100k 0603 resistors and 0.1uF 0603 caps from digikey (wouldn't really add much cost, they're cheap!)
I should hear back sometime next week, so I'll keep you all posted.
PS...they also show limited stock (13 pcs) on the Micron MT48LC4M16A2-10A part that has been reported to work in this thread by nowhere