I've got an update for you. As of this morning, you can change mech.
To change mech, as long as you have the Elite packaged purchased, go to http://mwomercs.com/founders, log in and click the box that reads "Choice of 1 Founder's Mech". In the window that opens up, select your mech and then click "Submit". It will now be your selected mech for the Elite Founder's package. For the moment, you can change mech as many times as you want but come August 7th, the choice will be final.
See you in game!
Hope it's okay that I post it here. Just wanted to let everyone know, since it was a common issue.
Edited by Patu, 03 July 2012 - 11:59 PM.