a tool that simplifies the process of compressing and sending your files online. It isn't a replacement for the traditional desktop compression tools, but its just a tool that makes things easier by cutting down all the 'krunching' hassles.
You can : aggregate several rss to one, make an rss out of emails, make pdfs out of rss, send rss to mail, turn your pop account into an rss feed, make a podcast of rss with voice reading and so on.