This sucks! From a Coldplay website:
If you were planning on seeing Coldplay June 29-July 12, you are totally hosed, as no dates have been announced to replace the cancelled ones, and seem unlikely since the band heads overseas immediately following the North American jaunt. But you are equally hosed if you planned on seeing the band in Sacramento, San Jose, Winnipeg, Omaha, or their second show in Chicago, because those dates have been cancelled to make up dates in Boston and D.C. These dates may be made up when Coldplay return to North America in November.
Too bad for us....Their new album is amazing!