Maybe:
<a href="http://bitnami.org/stack/wordpress#cloudImage" rel="nofollow">http://bitnami.org/stack/wordpress#cloudImage</a>
I'd lean toward 32-bit Ubuntu if you want to avoid issues, but 64-bit if you are thinking long-term maintenance. Even though 64-bit should work, in my experience dealing with 64-bit for simple stuff ends up being more of a pain than it is worth. Of course, I'll probably get downmodded for saying this.<p>See also:
<a href="http://aws.amazon.com/amis" rel="nofollow">http://aws.amazon.com/amis</a>
Some more: <a href="http://aws.amazon.com/search?searchPath=amis&searchQuery=wordpress&x=0&y=0" rel="nofollow">http://aws.amazon.com/search?searchPath=amis&searchQuery...</a>