LogMeIn provides a FREE App for iPhone and iPad
If you missed the news over xmas, like i did, then there's some great news for LogMeIn users.
They have now moved to a free model, so you can get the new LogMeIn app for Free on the App Store - LogMeIn
LogMeIn site: https://secure.logmein.com/products/ios/
Article and link to press release on Engadget: LogMeIn remote desktop app goes free on iPhone and iPad -- Engadget
It's awesome on an iPad, but still very usable on an iPhone. Very sleek, with nice use of gestures, you can even handle multiple screens easily, which is a pain on a desktop.
Haven't quite got used to clicking, but it's very powerful.
The old app, ignition is still available and you can also go Pro for extra features, but for basic remote support, i think this is invaluable, especially on those nights, when you get that late night phone call asking for a password reset ;)