A Japanese store seems to have some 2.2GHz 3700+ San Diegos in stock along with some 2.4GHz 3800+ Venice chips.
Japanese site Akiba has pictures of the chips here and here.
A 939-pin AMD Athlon 64 4000+ San Diego 90nm 1MB L2 costs £406.08 including VAT on pre-order at Tekheads, here.
An Athlon 64 3800+ Venice costs £266.49 including VAT. µ