Ever read one of those top ten lists or photo galleries where every item is on a different page? You spend more time clicking "Next" and waiting than actually reading anything. PageZipper is a free bookmarklet which automatically merges all the "Next" pages into one, so you can skip directly to the stuff you want.
Slideshare is a fantastic resource for sharing presentations, so you can enjoy and learn from smart people even if you cannot attend the conferences and events they often speak at. Some slideshows lose a lot of meaning if you dont have the author walking and talking you through them, but others are excellent, and there's a kind of brevity associated with the best presentations / slides, which helps to drill home the message.
Badges are the popular design elements of the Web 2.0 look. Below, there are many Web 2.0 looking badges which can be used in banners & other graphic works.