I hate to say it, but writing letters to Motorola is futile. If you look at their entire corporate culture, they've been locking down Linux phones tighter than Tori Spelling's 90210-era chastity belt since before the iPhone even existed. Without pressure from Google and/or Verizon, Motorola's never going to change. I mean, for god's sake, they locked down and embedded suicide bombs in UNLOCKED, UNSUBSIDIZED phones sold directly to consumers (the Droid's GSM cousin). Not even APPLE is that messed up and evil.
The only thing that might get Verizon's attention is, if they have a 30-day guaranteed 100% refund policy, for Verizon customers eligible to buy one to engage in an organized act of public civil disobedience, like buying one, then returning it for a full refund exactly 3 days later and, if asked, saying they returned it due to the locked bootloader. It wouldn't *crucify* Verizon (they'd just end up getting RMA'ed to use as insurance replacements), but it would definitely get their attention as long as users returned the phones after EXACTLY 3 days -- a length of time that would be unmistakable and definitely NOT just users who wanted one to use free for a month, or who just "didn't like" it.
In the longer run, besides actively shunning them and creating a culture of negative peer pressure against buying a Motorola phone, there's not much we can do short of coming up with an easy way to hack a cheap JTAG programmer together using a FTDI usb-FIFO bridge chip on a breakout board (they came out with new chips a few months ago that have native extensions to handle things like SPI, I2C, and JTAG). Or at least make it accessible enough for the independent phone dealers that will now unlock a phone to be able and willing to rewrite a Motorola bootloader with a JTAG for $25 if you take/ship your phone to them for the mod.