If you are collecting directories of web sites optimized for mobile browsing, you can now add 4INFO (http://wap.4info.net/) to your list. It's not as complete as pdaPortal (http://www.pdaportal.com), but as a new kid on the block it still has all the potential.

[via SearchEngineWatch (http://blog.searchenginewatch.com/blog/050819-131722)]