Utility for merging and splitting PDF files

I was looking for a free utility to split and merge PDF files and the best option I found was pdfsam. It had quite a few useful options and best of all it is completely free for the basic version. It also has an enhanced version, which is best described by this from the website.
"pdfsam enhanced is “almost” free, you can download the source code, compile and use it or, if you think it’s worth it, you can make a donation."
The enhanced version comes with some advanced features, which most users would not require. Give this software a shot if you are looking to play around with PDF files. The download page can be found here.

Dropbox

Dropbox - A great new way of sharing and organizing files between multiple computers. I wonder how much disk space they would be able to afford for each user when they go public. Right now I'm still waiting for my beta invite, so maybe I will put up another post when I find out more about it. An article on Digg about the same.

Very interesting advertisement

I thought this was brilliant