Update 2: Google Voice product manager Craig Walker confirms that the Apps transfer is NOT supported right now, and that it was only done for a small group of testers. Sorry, all. The good news? He says there will be a way to transfer your Voice account to Google Apps once the new GApps features that are being tested right now launch. In the meantime, I'm removing the link to the request form from this post.
If you've been aching to transfer your Google Voice account to your personal Google Apps account, this officially unsupported method worked like a charm for my account.
Update: After I published this post, Google added very strong language to that form insisting that transfers to GApps accounts are NOT SUPPORTED (caps theirs). I'm not sure why it worked for Dustin and myself. Your mileage may vary.
Even though this request form says it doesn't work for Google Apps accounts, I can confirm that Google is transferring Google Voice from regular Google accounts to Google Apps accounts right now. Thanks to a comment by reader Dustin Boston, I gave it a try this afternoon and within the hour, my Google Voice number, texts, and voicemail was ported to my Google Apps account.
If you try this, a couple of things to know: You'll have to enter your 4-digit PIN into the request form. I forgot mine, had to reset it, got it wrong the first time, got a message saying so, reset it again, and then all worked. Write down your PIN. It's only 4 digits. You'll have to re-record your Google Voice name and greeting(s). They don't get ported. I maintain an Apps contact list, so this didn't really affect me, but Dustin recommends exporting your Google account contacts before the transfer so you can import them into your Voice account.
Here's the form to request the transfer [removed] Even though it does say it doesn't work for Google Apps accounts, it did work for Dustin and myself. So proceed at your own risk, but if you do give it a try, let's hear if it worked for you in the comments.
[via Smarterware]