Basically what the title says. I rooted my phone with unrevoked (I am not sure if I used the "forever" version or not). Will installing the 2.3.4 Gingerbread OTA update from Verizon remove my root? I'm not running any special ROMs if that makes a difference.
Yes, what Cheuer said.
Installing an OTA while you're running a customized ROM in any way (even just rooted) pretty much always screws up root, sometimes even having a high risk of bricking your phone. NEVER install an OTA update while running customized software. If you ever want to go back to stock software, you need to go find the thread for your phone/ROM that tells you how to do this. Only after reverting back to stock should you attempt an OTA install.
Lastly, note that after an OTA update, you aren't always guaranteed to be able to root your phone again. Sometimes you're stuck unrooted.
I would recommend not installing the update while you have root. The manufacturer of the device could have changed something in the update which stops the root from working either intentionally or unintentionally. If this is the case there is a risk that the phone will be bricked (i.e. stop working). I would recommend seeing if you can unroot the device then perform the update and then put the root back on if you can.