Tumblr Ressources

Hi all,
Based on the blog post by AngelaCW - respect to you -, I’ve decided to start this discussion - I think it deserves it in our recent born community. A little different from the discussion about tumblr hacks.
Let’s make this forum a big ressource to learn as many things as we can about tumblr.
Denis R, if it seems useless to you or the community, feel free to delete it.

First Steps: The basics
Custom themes: Official page from Tumblr, giving basic elements to custom themes. To use these, be sure to go to your settings tab.

Going deeper: Customize
Tumblr Hacks: Tips, suggestions and hacks to master your tumblr space. By the great Denis R, creator of this community.
CustomizeTumblr : “making it better”. Says it all.
Tumblepedia: Wiki, forums and themes. All around tumblelogs. Not only Tumblr. Built by Cameron.

Expanding & networking: Groups
The Tumblers: Ours. Tumblr is beautiful.
Tumblepedia forum on Tumblr
Yahoo! Tumblr group
Facebook Tumblr Group

Chasing Tumblrs: Directories
Tumblr Radar: Visual timeline. Cool to see what’s happening on Tumblr. Right now. Anywhere.
The Tumblelist: Tumblelog directory. Hasn’t been updated since june 07.
Made in Italy: Italian tumblr directory.

Feel free to add more and more and more…

P.S. : Thanks to Chris for commenting Angela’s post and giving useful ressources as well. (via Forum - The Tumblers!)