Help! Do any of the book community sites have an iPad app?

I don't find the iPad app store very easy to browse--for one thing, they don't list enough apps per page so you're forced to keep paging through the list rather than just scrolling down. I've tried searching specifically for the sites I know of, but haven't had any luck. I typically use Goodreads but they don't appear to have an iPad app (just iPhone/iPod). I also couldn't find an app for LibraryThing. Are there any I'm forgetting?