6m is an ideal band for experimenters. Local coverage is very good, Es DX possibilities in spring and summer are good (strong signals out to about 1500km) and the frequency low VHF so less layout critical than 2m.
I am always on the lookout for interesting ideas for 6m QRP rigs and just noticed this one from Japan. This amateur also manages to package his designs so neatly: they look like factory-made products. See http://www.qsl.net/7n3wvm/xcvr-6m.html for a neat 3W QRP SSB/CW transceiver.
Sixbox on my main website. Ideal as a basis for further design for local natters. Very simple concept that works. On the main website click images and schematic for clearer versions.
See also http://www.pg1n.nl/articles.php?lng=en&pg=145 for a list of 6m designs. His website also has lists of designs for other bands.