Let's make good thread on ultimate resources for blogging.

I'll go first

Blogging Tips

Problogger
Blogging Tips


Icons
Webtreats
75 Beautiful Free Social Bookmarking Icon Sets
400+ Beautiful Twitter Icons
100+ Remarkably Beautiful Twitter Icons And Buttons


Commenting Systems

Js-Kit
Disqus
Intense Debate

Wordpress Themes
Skinpress

Best Wp themes

Blogger Themes
Falconhive
B-Templates
DeluxeTemplates
Blogger Styles

Add to this list your own list of resources like for plugins, hosting, etc.