I think I can take some credit for "discovering" this. Watch this local news story
about the product. I am the "customer" she mentions. When the DS came along, I was trying to find a better stylus option, and I had a faint memory of one you wrapped around your finger. I scoured the Internet and found the comfortstylus.com website
(such as it is, and it was far more basic then). I placed an order. Weeks went by. Finally I got an apologetic email from the president of the company. I think I was a very rare purchaser. I told her about the DS and how I thought the Comfortstylus looked perfect for gaming. She sent me a couple of them, I gave her some feedback, she actually changed the design a bit, and I started seeing it mentioned in gaming mags and sites.
It really is a good pairing with the DS. Right now its only drawback is it's too long to hold in the DS stylus slot. With the bigger DSL slot, it might fit.