Reaching the "official" boundary of space at 100Km has major difficulties for amateur efforts, and attaining orbital tangential velocity even more so. AMSAT and related programmes get a lot of amateur gear into space and into orbit all the time, but their launch vehicles aren't amateur ones but commercial. Amateur satellites mostly just piggyback on expensive commercial launches and fill spare volume in the payload platform.
As rocket launching is so hard, I expect the Raspberry Pi to be better represented among the "high up but not officially space" efforts that push the limits of high-altitude ballooning to around 30Km or higher, officially "near space". This can be very inexpensive, and yet immensely rewarding — absolutely fantastic pictures can be obtained, and the sense of accomplishment, wow!
Lots of groups have done this in the past decade, here are a few nicely illustrated links of successful projects that hit the news:
(full details of above)
Improving technical education in schools was the primary motivation for Raspberry Pi, and ventures like the above fit this goal like hand in glove. It's hard to imagine school science projects more enthralling than reaching near space.
PS. It's *very* important for education never to mention "orbit" in the context of this kind of high altitude ballooning, as it's totally incorrect, and would badly mis-educate youngsters. Journalists seem to be totally beyond hope of education regarding the difference between near space, space and orbit. We can't do anything about that, but we shouldn't echo their mistakes here.