Useful links, parts suppliers & more...

http://habhub.org/
UK high altitude webpage that has a number of useful tools:
Landing prediction using the European model of upper air
Burst calculator – useful for deciding burst height, necessary neck lift,. etc.

http://bigredbee.com/
Builder of the 2M gps transmitter I used

http://kaymontballoons.com
Hands down the best balloons made. Easy ordering.

http://chdk.wikia.com/wiki/CHDK
Downloads for hacking your Canon camera with great forum support, as well as an list of the hackable cameras.

http://www.arhab.org/
Register your launch with HAB community;  good links for other resources.

http://www.highaltitudescience.com
Where I got my balloon inflator/regulator; easy to use.
Nice kit for “out of the box” HAB (but where’s the fun in that?!!).

http://jhabproject.com/
Father and son HAB enthusiasts. Good resources and stories.

http://www.qsl.net/ara/
Athracite repeat association website. Our local Ham radio club of which I am a member. Helpful group of people that helped aid in tracking and working out the radios.

http://aprs.fi/
Real-time tracking site for following your balloon or others’.