Maybe one for those in the trade. I see Shimano has a new Sora range of 27 speed for 2008. Does this mean they are moving away from 21 / 24 speed systems ? This worries me a bit as having 21 speed on my hybrid I may, in the future struggle to replace kit. Scenario :- Fall off bike, mash rear derailleur. At the mo, nip to shop, get replacement. In the future I cannot replace the 7 / 8 speed derailleur, so it's a new 9 speed derailleur & cassette, chain to fit these which also means a new chainset and possibly (?) a new BB. Not an insignificant difference in the amount of kudos to lay out, eh?