TeuxDeux, my favorite simple to use and difficult to spell todo list application, has quietly launched an iPhone app. They’re apparently waiting to announce it later this week, but Tina Roth Eisenberg (the designer behind TeuxDeux) recently talked about it on The Pipeline with Dan Benjamin. The app costs $2.99 and supports all of the features of the free browser-based version plus support for multiple accounts, and it’s always in sync with your accounts on the website. You can buy the TeuxDeux app here (iTunes link.)