Sony 2010 - extensive list of mods and tips
Radio Shack DX-400 - Build a Keypad
Sony 6800W - Dial Light Switch
Icom R70 - DC power jack for Icom R70 and Icom R71 battery operation
Sony SRF-A100 - X-band tweak that might work for other radios
Credits: Thanks to all who inspired or passed on ideas expanded on here. Some of these are David Newkirk's "Enjoying Radio", Don Moman's CIDX column, Ken Zichi's 2010 FAQ, Fine Tuning "Proceedings" 2010 article, Speedx article on 2010 nicads, and thanks to Ulis F. for the logo.
2010 questions are best asked on the 2010 Yahoo-group list. Check out their archive of helpful posts.