Still using and loving my $13 Linksys WTR54GS. Too bad the model was discontinued early this year; I don't think anything else beats it for compactness and ease of use. I especially like the fact that its AC power supply is built-in; push the slider to extend the AC plug and the unit hangs off an electrical outlet like a wall-wart
EDIT: They still seem to be easy enough to find on eBay . . .