[The Forum software helpfully points out that this topic has been quiet for a while, but I thought I could make a useful first post here.]
I rode my steel Vaya on the 2011 Cycle the (Columbia River) Gorge tour. For those of you not familiar with it, this is a 6-day, 360-mile "intermediate" tour with O(20,000) of climbing. The tour was supported, so the bike was unloaded, except for a small trunk. Therefore, you may stop reading now if you seek a loaded touring opinion.
The tour was fantastic, but that's another topic...
The frame size is 60cm. The drivetrain is 9-speed Shimano, 50/34x12/32. A triple or a 12/36 would have been useful in spots, to allow an increased cadence at 6 MPH, but the D-A 9 left shifter I'm using is (I think) double-specific. Wheels are Velocity Dyad, 36h, on M765 centerlock hubs. Tires are Vittoria Randonneur Hyper @ 32mm, usually inflated to about 70 psi. The stem is 120mm or 130mm, I forget which. Bars are 46cm. I'm running a lot of stack height at the moment, at least 3 cm. The seatpost is straight (no setback). Brakes are Avid BB7 road. Fenders, a basic rear rack, and 3 bottle cages were mounted for this tour.
This bike was very comfortable and extremely stable over a range of speeds up to 45 MPH. Fairly technical descents out of Gifford Pinchot wilderness and various other spots were not a problem (of course had I not been paying fairly close attention the Forest Service probably would still be looking for my carcass!). The disc brakes helped immensely, particularly during the one wet day we had.
Climbing was what you might expect - while the bike was not loaded, bare weight has to be close to 30 lbs. With me (6' 4", 190 lbs) mounted, it felt best to enjoy the scenery and not drop my under-trained teenage son rather than try to go "fast".
Three sets of cage bosses are nice, as are the numerous mounts for racks & fenders. The seatpost clamp bolt needs to be quite tight; I had a bit of slip on the first day, but that may have been down to a reassembly error after shipping to Oregon. The required (not measured) torque made me a bit nervous.
The "Upside Brown" (root beer) finish is quite nice but the paint is somewhat less durable than I'd like. Last I checked Salsa were not making touch-up paint available. I've found, but not yet purchased, a couple of nail polishes which are a decent, but not perfect, match.
Bottom line, I bought and built up this frame for running around town, pulling a trailer, and light touring, with the possibility of loading touring in the future (again, possibly using a trailer). Final choice was made based on fit - long HT and large BB drop to accomodate my size and an upright riding position. So far the Vaya has served me quite well. The frame cost was very reasonable, even at list, which is currently about $550 (mine was purchased at a small discount).
Hope that helps -
Tim