Don't forget people who have built a working manned submarine, sea-based launch platform and plan a suborbital flight at 100 kilometers. Their last launch had the biggest amateur rocket yet reaching 3 kilometers of altitude : http://www.copenhagensuborbitals.com/
As for those asking about the feasibility, the HAM radio crew have had their own satellites for years: http://www.amsat.org/amsat-new/index.php
Also check out these hackers who want to go to the moon: http://www.youtube.com/watch?v=xmgzrDCrP30