There has been talk on the board about compact doubles for light touring or even the VO 46/30 vs a traditional triple. However, I haven't read anything in regards to a MTB double like the ones from SRAM: http://www.sram.com/sram/mountain/pr...ram-s1400-2x10. With 39/26 and 42/28 they could even work for loaded touring or century riding.
Since I am a novice in regards to mechanics/components, I could be missing a perfectly reasonable explanation for why it won't work. Shifters? What am I missing? Seems like the advantage of a double with a low enough gear for climbing.