This video via way of Nokia Conversations Team shows the latest technology for Nokia Touch UI devices – the handwriting calculator (Beta Labs). This free application is supported to date by the Nokia N800 and 5800 touch Ui devices… pretty slick! A little sneak peek at what you’ll be able to do with a touch UI. Interesting to note, the Nokia 5800 (touted as a Music device) is also surprisingly rugged. According to Conversations, the device was recently put to the test and was dropped, kicked, and even put through a dishwasher and into a deep freeze… surviving just fine! I might suggest that Nokia consider releasing a more rugged looking version with grippy sides, a cool flat back and yellow casing, and some enterprise applications then push it to enterprise users, perhaps as the 5800 ExTreme!