The Money Merge Account is just a smoke-and-mirrors game. The cost is $3500, and $2500 of that is paid out in commissions to support the pyramid scheme that sells it.
The MMA directs the homeowner to use a HELOC (or lately, a credit card) to float their income and send advances to their mortgage. UFirst doesn't call this "float" - they call it "leverage" (they're wrong) and they tell you this will "cancel interest". Right away, you should see the folly in this plan. The MMA asks you to borrow at a high rate to pay your low rate mortgage.
As brooke1lyn said, there is a lot of information about the MMA out there, but you won find it at the address brooke1lyn gave - that's an agent website.
There is plenty of discussion, including comparisons between the MMA and the simple DIY method of mortgage acceleration at the links below:
http://www.fatwallet.com/forums/topic_view.php?catid=52&threadid=767134&start=0
http://scam.com/showthread.php?t=23250
http://www.fatwallet.com/forums/topic_view.php?catid=52&threadid=741118&start=0
http://scam.com/showthread.php?t=46373
http://www.thesimpledollar.com/2007/03/03/money-merge-accounts-are-they-a-good-deal-for-home-borrowers/
The most high-profile review was by Kiplinger's:
http://www.kiplinger.com/magazine/archives/2008/05/prepay_mortgage.html
UFirst agents may refer you to 5 or 6 publications that endorse the MMA. These are all small rags with limited distribution, little history, and less integrity.
UFirst agents also like to point out that Ernst&Young gave them an award. It was an actual award, but it was sponsored by E&Y, and the winner was not chosen by them. It was for "Entrepreneur of the Year". In Utah. Amway is a previous winner of the same award, if that helps clear things up.
Having saved a friend from wasting $3500 he could ill-afford on this scheme, I try to save others from it, too. It is an affront to common sense and I find the marketing of this "product" to be predatory. Avoid it, and caution anyone who asks about it to do the same.

