I'm actually subscribing via ipadforums RSS feed with Google Reader to view new threads. When I see a good topic, I then jump to the forums and respond or just subscribe via thread tools to the thread to get notifications of new posts. So, I can use my desktop with Google Reader, or River of News on the iPad. River of News pulls my Google Reader feeds, and has a built in browser feature which makes it easy to post and subscribe to threads. I decided on River of News for my iPad RSS reader over all the others available because it's what I like, but there are plenty of other RSS readers for the iPad. Also, using RSS feeds is much more lightweight on bandwidth when I'm using my Android 3g WiFi tether with my iPad. Not to mention that all of the email notifications to the threads I subscribe to are text based. Keeps participation in forums nice and bandwidth light!