The best todo app on the iPhone/iPod

I love Remember the Milk. I’ve been using it for about two months now, both for work and personal lists. RTM have recently released an iPhone/iPod app to integrate with their web app. It syncs your data for use offline and unlike Appigo’s Todo (which also syncs with RTM) it supports tags. True you do need to have a pro RTM account but at $25 per year it won’t break the bank. It’s certainly less than buying the awful, slow and crash-prone OmniFocus for iPhone along with either the desktop version of OmniFocus or MobileMe account you’ll need to sync it to. Oh and did I mention that it will eat your data?