ChevronWP7 Labs will be coming to an end as soon as those remaining "tokens" sell out. This was (and still is) the only sanctioned unlocking tool outside of Microsoft's $99 AppHub and was to serve as the gateway to a large homebrew community.
Not to mention allowing new devs without the hundred bucks to play around before committing to the platform.
The team of ChevronWP7 Labs, made up of Long Zheng, Rafael Rivera and Chris Walsh, have put out a statement on the matter:
"ChevronWP7 Labs enters the New Year with 10,000 token sales under our belt. Hooah! Nearly 90% of the tokens we’ve sold have been used to successfully unlock a Windows Phone thus far.Our agreement with Microsoft was to sell no more than 10,000 tokens. Our team doesn’t currently have plans to renegotiate this number, although it’s a matter we’re still discussing."