I’ve just set up an account on Slideshare and uploaded an export of my PhD defense slides:
Another great service if you don’t mind having some data in the “cloud” 
I’ve been using Dropbox for a few months and I must admit that it is a really great and useful service.
Dropbox provides you with a 2Gb space for storing and synchronizing files across several computers (e.g., work and home). It works in a seamless fashion:
Dropbox also supports a notion of shared folders so that you can easily exchange some stuff with friends. You can also have public folders and give the URL of a file there to the world.
Last but not least, it works well across firewalls (I can speak of that as I’ve been through some very picky ones). I don’t know if they are using a WebDAV protocol or a custom one… did anyone sniff the network traffic?
It is currently an invitation-only service (thanks Guillaume!), so leave me an email if you want to try out, I have a few invitations left!
