Nope. You can actually pull recovery.img from an RUU zip and flash it over AmonRa. This will give you back stock recovery. Problem being that it has to match your current firmware. So if you're on stock GB, then you should be able to get it from Scottsroms.com . Once you do this it should let you complete the OTA if you want. I don't remember if it lets you do this unlocked or if you need to relock... Either way, you have this path, or go down the ROM'ing rabbit hole.
Didn't see a recovery.img in the latest OTA package. No updates to it maybe?