PAX East is being held in Boston, Massachusetts from March 26-28 at the Hynes Convention Center. Tickets to individual days are $25, while a three-day pass runs $55.
Judging from ticket sales to PAX proper, pre-sale tickets to PAX East could eventually sell out, so make your plans accordingly.
Buy tickets NOW if you want to go to PAX. If you procrastinate, they WILL sell out. I know several folks that dragged their heels for PAX over here and missed out each time.
I got my PAX 09 tickets in June/July. Waiting for another six months can't hurt, haha. :D