I just ordered the BoxWave Capacitive iPad Stylus (sorry, I'm new and not allowed to post links .. ). I've read ALOT of reviews for stylus' and this one seems to be perfect, according to other reviewers - other than the price. From what I've seen the only reason these suckers are getting 5/5 ratings is the price, which is about $15 right now (normal price is $25).
I've seen ALOT of reviews in contrast to the Pogo Sketch, as many people are stating that the Pogo Sketch requires almost a "perpendicular" way of writing to get a good solid performance out of it - so very painful to write with if you are going to spend a lot of time writing on the ipad (notetaking, etc).
I should be receiving mine in the mail in a few days, so I'll post back my results.