According to the Tweeter Center Boston web site, tickets from the two shows in the Boston area will go on sale on Saturday March 8th at 10 am. Prices are $65 reserved and $35 lawn.
Today’s Boston Globe has Saturday at 10am as well
http://www.boston.com/dailyglobe2/064/living/Concert_update+.shtml
Clear Channel has both shows listed
http://cc.com/artist.asp?artistID=2806
Be sure to check the TicketMaster web site for the on sale dates and times for other shows.