The whole thing was slow, communication was crappy, but boy was it fun! As a young NetEng this was an awesome opportunity to learn BGP better and mess with all the BGP settings.
Apparently there are folks that run all kinds of services over DN42. I never really dug in enough to look though.
EDIT: I dug through my email, I was AS#4242420690 (I was having fun here) and I think I was assigned a /28 or /29. My setup was particularly slow because I was nervous to peer from home so I used a VPS in Czech Republic as my VPN pivot point. OpenVPN from VPS to home where the Cisco router lived and OpenVPN to the BGP peers. I then could communicate from the Cisco router through the VPN to the VPS to the remote peers on the other VPN through the VPS. I definitely over complicated things but it was fun!
Either way, get started here: https://dn42.net/howto/Getting-started