I gave it a go last night - very impressed!
Planner access: Look to see what has been recorded and what has been set to record, plus you can select existing recordings and choose to watch them (on TV), etc.
Guide: Full Guide, as before, but in addition to Remote Record you can now also set a record straight away via the local network connection... plus you can pick something in the Guide to actually watch and it will change channels for you.
Remote control: Pause/Play, Fast-forward, Rewind, Channel Up/Down.
All it needs is power on/off plus Anytime+ and you could ditch the IR remote completely! The ability to watch on the iPad itself would be a brilliant addition, if that does come at some point.
This app will be very handy. e.g. if I'm watching something and Mrs D needs to check the Planner to set a recording or delete something I don't have to stop watching my programme as she can do it all via the iPad. It could even be used like one of those remote sender things, to control the box while watching the bedroom RF feed.