No Canon 5D Mark III until 2011
At least according to Canon Rumors so take your "news" with a grain of salt.
Also from the online rumor mill, "in August we've been told to expect several lenses that are a direct answer to customer demand," and demand for a Canon 24-70 2.8 IS zoom lens definitely tops the list. If that's the case, I'll be first in line. Love that lens but gotta have the IS!