I remember a lot more simple circuits being available on the bbs's. I guess it's been a while but this new bbs thing (the "internet" they call it), just does seem to have as many. Any who, I have found a few black box-less radios (tx or rx) out there. Just surprisingly fewer than I would have expected.
http://www.somerset.net/arm/fm_only_one_transistor_radio.html
http://talkingelectronics.com/projects/200TrCcts/200TrCcts.html#51
http://electroschematics.com/4663/small-fm-receiver/
http://electroschematics.com/601/2-transistor-radio-receiver/
http://www.techlib.com/electronics/crystal.html
http://www.tompolk.com/radios/macrohenrydyne/macrohenrydyne.html
http://www.zen22142.zen.co.uk/Circuits/rf/2bjttx.htm
http://www.zen22142.zen.co.uk/Circuits/rf/2bjttx.htm
So clearly there are some good resources out there. They just didn't jump out at me like I would have expected. Any preferences?