My current favourite Web 2.0 tools:

Flickr

Scrapblog

Bubble.us

Issuu

TrueTube

GoAnimate

Blurb

Other Resources:

TED - Ideas Worth Sharing

Eduspaces - a social networking site dedicated to education and educational technology

Gliffy - an online diagram drawing tool

Basecamp - a brilliant project management and communication tool

Writeboard - collaborative writing software

Zoho - a suite of online office applications

My Stickies - "Bookmarks on steroids" according to the creators!

EasyBib - takes the pain out of creating a bibiography of sources