Ok, I have decided that I want to replace the standard 170 MM cranks on my Slipstream with 155 MM cranks more appropriate for my Hobbit legs.
So I Googled and found almost nothing. Looks like the shortest commercial Road and MTB cranks are 165 MM. There are 155 MM and shorter cranks out there but [...]
Read the complete post at http://ebent.wordpress.com/2008/03/05/so-you-want-shorter-crank-arms-now-what/