I don't think it'll ever be a desktop player. The main idea of this wasn't to be a good music player but to be able to sit down and listen to your music anywhere (almost anywhere until the basic version is included, this version needs an up to date browser). By doing it on the web I get the benifit of a nice layout rendering engine and cross platform support.
Besides like I said before, you can use Google Chrome/Prism for FF to make any web app into a peudo-desktop app, I've tried it with LocalPlayer and it works great.
And yeah at this point it's only loosely based on foobar, more inspired by foobar
Hate bumping this thread for so long without a release, I really want to get one within a month so not too long left (even bought the domain today).