I'd completely forgot about the Portable Ubuntu project until I was researching the reason for the Ubuntu counter being offline again (last went down late last year). Looking through their forums shows they are currently in need of volunteers willing to give up over 600MB (the size of the latest portable version apparently) of space on their server, and of course, the bandwidth to go with it;
Portable Ubuntu is a fantastic choice for Windows users wanting to try out Ubuntu, but don't want the hassle of burning ISO's, or using Wubi etc, as you can just download and run it as you would any other Windows application.
You can find their homepage at;
And a review of it at;
If you've got some space and bandwidth to spare for a wonderfully useful Linux project, please do get in touch with them.