Here’s my top 9 Twitter Directories to make sure you are listed on:

1. Twellow – Right now the crown jewel of Twitter directories.  If you only bother with one on this list, choose Twellow.
2. Wefollow – My personal favorite for the simple design and usability.  Built by Digg co-founder Kevin Rose.
3. Twittercounter – My 2nd favorite as it acts as a statistical tool as well.
4. Twitterholic – Another one of those directories that ranks users by followers.  Kind of fun to see where you rank based on filters.
5. JustTweetIt – A directory of Twitter users sorted by categories. Nothing groundbreaking here, but just another large directory to list yourself to be found.
6. Geofollow – GeoFollow allows you to list yourself geographically and categorically.
7. Tweetfind – Free Twitter yellow and white pages directory.  Not the best looking directory, but front page on Google for “twitter directories”, so worth the listing.
8. Twibs – Only really applicable to businesses, but everyone is selling something right?
9. Hashtags – This is simply a directory of hashtag users on Twitter.

What do you think? Is their value in these directories? Do you use them?