If you didn’t download ChevronWP7 unlocking tool, you are too late now! Today the team discontinued their tool after a discussion with Brandon Watson, Director of Developer Experience for Windows Phone 7:

Through this discussion, we established a mutual understanding of our intent to enable homebrew opportunities and to open the Windows Phone 7 platform for broader access to developers and users.

To pursue these goals with Microsoft’s support, Brandon Watson has agreed to engage in further discussions with us about officially facilitating homebrew development on WP7. To fast-track discussions, we are discontinuing the unlocking tool effective immediately.

So it looks like an official way for homebrew development on WP7 is coming! Great news, no? Just hope it’ll be sooner rather than later.

Even though the unlocking tool has been pulled, Rafael, Chris and Long did release the first WP7 homebrew application taking advantage of unlocked phones: ChevronWP7 custom ringtone manager. The source code of this app has also been made available to guide homebrew developers.