I'm with beatle on this one -- hard to believe excitement over a notepad application, but this one looks excellent. I will be trying it out soon, I currently dont have access to my mac 😱
Another nice notepad program I use is notational velocity... supports multiple documents with nice keyboard shortcuts and also encryption. xpad looks a lot nicer though 🙂 I skimmed through the web site (awesome design btw... I do web stuff and I notice when a site is well done, I love the look of yours) and couldn't find anything about encryption. That would be my only feature request.
edit: export to ipod is an awesome idea!! very cool