Socket A cpus are just starting to show up. Not sure of anyone who actually can ship one right now. Same goes for most of the motherboards if you want a choice.
I know you don't want to hear this but I would wait for a few more weeks until the ASUS and Abit boards become available, most of the reviews rated them the top two boards for performance. Probably won't be until middle/end of August.
But there is an upside to waiting. Word is circulating that AMD will have price drops Sept 5, and probably introduce new speeds at same time. 1Ghz $495. 800MHz $190. are a couple of prices being quoted.
http://www.jc-news.com