Or showing you since you learned about them here. :P
They are way fun - I rode my GPR on the Creatures/Sunset Riders ride last weekend in SF, that was a lot of fun.
I've seen from photos and videos that there are quite a few of the Honda MB5s or NS50s that show up at the rallies. Since Derbi has such a strong presence in the moped sphere, and that there there is so much over lap with the technology it seems natural to integrate. :)
The one nice thing these bikes have is the six speed transmissions - this makes it somewhat easier to keep the revs in the power band, which on a two-stroke is everything. :P
On the Bats forum we regularly post up double digit bikes that we see for sale, so if you are interested in one that's a good place to check. Let me know if you have questions about them.