Ipad apps

What's looking good on your ipad? I've not actually got that many on mine but I've got more games than I need for the next 6 months and the apps I do use keep me occupied for more time than I have spare but here's a few anyway:

wacom bamboo paper - good for scribbling on

Zite - could keep me occupied all day long

Flipboard - ditto

Engadget - pretty interesting but read it less now I'm using Zite/Flipboard

Sky News - q. impressive how you get video/text and graphics all together (****s on the BBC News app which is like a poor relation to the website)

BBC iPlayer - Brilliant (when it works although shame about the small HDMI output)

Not as yet got Garageband or iMovie and as much as I'd like a few of the productivity apps, I don't think they're worth £6 each to me.

Any recommendations?