Yes, that's the latest, the IET had a paragraph on their site saying that a BS7671:2008 amended edition was being compiled.
That was over 2 years ago so it looks like they'll save it to incorporate amendment 1.
Just had a look at that big online book seller to see how much they were charging and it has for the princley sum of £29.50 what is described as for pre order Paperback (28 Feb 2012) which I guess means there is either a reprint or new edition coming out in 3 weeks. Actually its described as second edition if that helps!