Seems to have been something of a 'soft-revamp', new co-presenters, the seeming replacement of Stuart 'landscape' Ainsworth and, most importantly, a leap forward in the CG effects/reconstructions. I especially liked the stone box/boiler/water container erupting out of the ground...
Hopefully they won't make too many immediate changes, I think one of the good things about Time Team is how it has gradually eveloved over the years. Watch an old episode on DocuDave or whatever and its wierd to see the stuff they don't do at all or as much. All those Victor Ambrus watercolours, lots of looking in books and they hardly ever get the whole village together for an explantion at the end anymore...