What about a DLNA app in the iPad/iPod. Mediaconnect works but there are loads you can try and find which suits your own needs best.
These will allow you to control the bs5 and browse the library and so select albums, tracks etc, pause, play and control volume. Total cost if you go for an expensive app will be about £2.99. You also retain the benefit o the sound quality from the bs5 rather than relying on an airport express.