No, I had Droid1 three days ago and took my upgrade and got the Razr. Unlimited data prior, unlimited data still. As long as you had a smartphone before the cut off your good, its the good ole grandfather claus
Sent from my DROID RAZR
That cut-off being, I believe, June 7, 2011? Or was that when it was announced?
Either way, there was some point at June/July this year at which, if you didn't have the $29.99/month Unlimited Data Plan for your Smartphone, it stopped being available. Now, to the best of my understanding, you are "Grandfathered In" to your unlimited data, thus so long as you do not change your plan or go from a smartphone to a "dumb phone" or anything like that, you will continue to receive unlimited data.
Also, the $29.99/month that you're paying is for "Unlimited Data", not "Unlimited 3G", and there is no difference in their system, apparently, between going from, say a HTC Incredible to a Droid X2 (both 3G) or going from a Droid 1 to a Galaxy Nexus (3G to 4G). You will retain the unlimited data, and if anyone at the VZW Store tells you otherwise, I would suggest speaking to a manager and telling them that their salesperson is lying to you.
However, regardless of whether you have 2GB/mo, 4GB/mo, 10GB/mo, 20GB/mo, or Unlimited/mo... You are still subject to having your data "throttled", in which your data speed will be cut back rather sharply. It really sucks that they do this, and even though I can understand why (at least theoretically), I greatly disagree; it is a blatant middle-finger towards Net Neutrality, and if Verizon can "take possession of the Internet", no doubt DSL/Cable/Fiber/etc companies will start to do the same.
I've had unlimited data since ~March'10, I believe, and the most I've used in one month was 52GB of data, the least has been 192MB of data, and I average exactly 4.75GB per month (Pandora, Movies, etc). For the past year or so, I've noticed that when I hit 2.125GB in a month, almost to the byte, I go from ~1.75Mb/s down, which is pretty darn good, to about 500-750KB/s down. I've tested this numerous times, at varying times of day, such as 9AM, 11AM, Noon, 2PM, 5PM, 10PM, 3AM, etc... I'm very consistent and keep an Excel sheet of date/time/temp/humidity/signal-strength(dbi)/towers connected-to/ping/download-speed/upload-speed/etc/etc/etc... I wanted to see what was going on, and I don't keep up with it anymore, but I can tell when the throttling kicks in. (I'm lucky; my house is in a neighborhood that, while in a suburb, falls right in the middle of the 3-tower triangle so those speeds are at home, with GPS/Sync/WiFi turned off, and with full-bars)