You've probably heard about Zamzar by now

Boy did I miss the boat with this post. I had bookmarked Zamzar a while back but never got around to blogging about it. So here it is. I think Zamzar deserves a bit more exposure since its a pretty useful site. Zamzar is a file conversion site. From documents to images to multimedia files it can handle it. In case you need a tool to resize image then be sure and drop by Quick Thumbnail as it handles this with ease.

Link:
http://www.zamzar.com/