Ever since Pandora prevented accessing the miniplayer directly a few months ago, I've been using a little bookmarklet to fake it. Set http://pandora.com/ as my IE homepage (about the only thing I use IE for) and put the bookmarklet in my links bar to click immediately after launch. Net result: a perfectly sized window, hiding all the non-player crap.
javascript:window.resizeTo(641,416);window.scrollTo(58,130);
You might try http://openpandora.googlepages.com/
Besides getting rid of the rest of the crap on the page, it gives you a bunch of global hotkeys I couldn't live without.
Jason,
I used to use that (as well as Pandora's Box), but they both gave me all sorts of grief. And one of them (whichever I was using at the time) stopped working correctly with the no-direct-miniplayer change as well. So I gave up and have just been running it in the browser. Maybe I should give them another try though.
+1 to what Jason suggested. It's working for me as well and it did give me grief like you mentioned, but it went away with newer versions.
Barney,
Nice, I do the exact same thing with an air app. Just seems to make since to have a little stand alone app. of some sort. (note: I built this before they created their own air app)
http://code.google.com/p/pandoralight/downloads/list
Someday I'll fancy it up with some short cut keys.
-M