Most coverage during the first week should be from the international feed, except for day 1. ESPN2 will be busy with the World Cup, so coverage will flip back and forth between it and ESPNU south of the border. The good news is that the international feed is actually a good quality broadcast (including HD) at Wimbledon, unlike at Roland Garros.
Between 6/28-6/30 coverage will come from ESPN2 until 10am ET, then from NBC from 10-1 ET then from ESPN2 again after that. On Thursday and Friday 7/1 and 7/2 coverage will come from ESPN2 from 8-noon and NBC from noon-5. Also worth noting that as part of NBC's women's final coverage, the men's doubles final will air immediately following the women's final. Of course Daniel Nestor of Canada is the 2010 Roland Garros champ and could make the final at Wimbledon as well. In the past this has not aired on Global even if Nestor makes it.
For those who care about commentators, NBC will use Ted Robinson, John McEnroe and Mary Carillo. ESPN2 will use Dick Enberg, Cliff Drysdale, Patrick McEnroe, Brad Gilbert, Darren Cahill, Mary Carillo (during the first week only), Mary Joe Fernandez and Pam Shriver.