I have recently rolled out 20 Blackberry devices in my organization. I got each Blackberry for $50 (after rebates) (End of January promotion).
In addition, I was also given 20 BES licenses for FREE (also an end of January promotion).
In total I spent $1000 for 20 Blackberry devices - and that is it - NO OTHER UPFRONT COSTS - this was all through T-Mobile!!!
I could not resist.