As of 2013, I am eliminating most upcharges, as I find it annoying to be nickel and dimed. Almost everything you can think of is included in the price of your frame, with a few exceptions (see below).
Base Waltworks frame price, w/one color+clear powdercoat: $1700
Waltworks custom full suspension w/Ventana rear triangle: $2500 including Fox CTD or Cane Creek DBinline rear shock and mounting hardware.
Waltworks Custom fork: $300 w/frame, $350 without.
S&S stainless couplers: Add $500. Take your bike on the plane for free! Please note that this is for the couplers themselves – a travel case is not included in that price.
Ritchey Breakaway couplers: Add $250.
That’s it – if you want sliding dropouts, extra water bottle bosses, rack mounts, fender mounts, s-bend stays, a headtube that will accept a tapered steerer, ISCG mount, loads of rack mounts, or any number of other things, they are all included in the base frame price. If you come up with something really weird or new, I’ll generally charge $50/hour plus materials costs.