that's pretty much what i'm doing!
i got a great deal on a mongoose frame on ebay (including cranks and fork)
which i'll feel better about having reshaped slightly to fit the hub
(from 110mm to 120mm, or so) than my current diamondback frame
(the orange hotstreak i'm told is the most rare)
and i'm putting a mountain bike stem and handlebar (v-shaped riser bar) on there.
got my sturmey-archer last week from jensonusa - it's really beautiful!
http://www.jensonusa.com/store/product/HU407C01.aspx
BTW - you do NOT need to buy a shifter & cable for it, it's in the box provided by SA.
so for about $60, you got yourself three speeds! hooray!
(not including shipping, and professional install of course
