Smart pen

I saw an ad about a smart pen the other day and I think the idea is really cool. Itz a pen with a built-in computer. You have a special dot paper notebook that you should use it with. The pen has a mic that records the class lecture and maps the notes you take to the lecture. For example, if you are listening to a lecture on Bayesian classifiers and you make notes when the prof talks about Bayes rule. Now at home, you want to know what the prof told about Bayes rule, just click on the relevant notes you took on Bayes rule and voila! the pen starts playing the lecture at the point where Bayes rule was explained. You can import your notes into your computer and even share it online with classmates. I tried to see if they have the facility to convert all the audio lecture into text but they dont seem to have :(. If they had, then my AMM would have become a reality. Oh yeah, they have an SDK for this pen. so there is a good possibility that AMM can become a reality :) I am very much tempted to buy this pen but he only pain part is the cost - $149 for pen with 1GB and $199 for a 2GB model.