I'm not sure if this will be useful to anyone but I've written a little web-app to monitor Bitcoin exchanges on a smartphone. So far it has only been tested on an iPhone and only supports MtGox and CampBX:
http://bitcoin-watch.atwebpages.comIf you're using it from a regular browser it'll look much better in Chrome but it should work in Firefox, as well. I haven't tested with IE.
Let me know what other features you'd like and I might just add them.