At this time each year, we see the launch of the following year's cycling equipment - sometimes (all too rarely in my opinion) a hugely significant technical advance is made. Shimano's development of STI shifters for road bikes, which seemed to stimulate parallel development at Campagnolo, is one of these cases. Addition of more gears does not. For example, cyclingnews.com has an article outlining the changes to Campagnolo's lineup for 2009, with the addition of an 11th cog to the cassette in the top three groupsets, among other things.
I have had absolutely no experience with SRAM equipment, so I have no worthwhile opinions on that. The kit looks good, has had good reviews, and it is good to see a third player in the field.
Good innovations