Someone may have already pointed this out (please correct any errors in my logic)...

If tmo does subsidize the N900 which seems like a reasonable assumption, what is your best guess as to how much they will charge? It seems to me like they would charge in the $300 vicinity. The price of the N900 unsubsidized is $560 on newegg, free shipping/tax free. So An extra $260 you would save with a subsidized phone, although tmo may very well charge taxes making the savings more like $245.

Tmo is not being very upfront on their website when it comes to the price of unlimited text+web with the Even More plan but Even More Plus w/ 1000 minutes w/ unlimited text&web is $60 a month. I'm guessing with Even more w/ 1000 minutes w/ unlimited text&web costs around $80, and you must sign a 2 year contract. So do the math:
$20 savings per month X 24 months = $480 savings over 2 years!!

How is it in our interest in any way to subsidize this phone? If you subsidize you are locked in (I assume) to Even More for TWO YEARS.