One of Sally Ride's options involved finished manufacturing and flying the extra tanks and also stretching the manifest. It added 2 new flights, via extra funding, and LON intact. It does not look this is the path that will be followed, if indeed the extra flights are added.
No, the extra flights will not be flown within FY 2010, that's impossible. But, I hear all the existing flight (the current manifest) will target FY2010 or not much later. And the extra flights (they can be at most three) are unlikely to slip beyond sept 2011. Robertross: sure the sts program is now expensive, but it's funded. Also, in 2009 Shuttle did LOADS of work, which with only two orbiters, will be limited. Operating Shuttle in FY2011 is pulling a rabbit out of the hat, as there's no official funding so far.