Ok, with campy having ten speed now shimano joining that boat, whats a realistic limit for how many cogs on a cassette? Taking into account the actual width of each cog how much wider will we get? Are we going to ever have 2x20? Is it just a matter of time? Surely 10 seems like a good max, I dont see much need for more, of course this was probably said when there were 7&8 cog cassettes. Just curious. Also, on another note, how long has STI and Ergo been around? Just curious.