Tiptronic shifter

[carbacca]

found this in the interwebby

seems pretty cool

note : in chinese but you can see the pics and wiring diagrams etc

http://www.ibike.com.hk/03_knowledges/tiptronic/01.htm?

[Kickaha]

This place has all the info in English
http://www.translogicuk.com/tls-ps2-sports.htm

[breakaway]

Interesting, but I would never get one unless for special application (Like a stunt bike where I need my foot free for other stuff). Would detract from the experience imo.