With the latest info from AT&T regarding the 8107 update (specifically that they don't have plans to offer it) and news that the HTC Titan and Samsung Focus S are reportedly going to be discontinued soon, the issue about force-updating the OS has been brought up as an alternative.
Indeed, there is a relatively easy way to force any Windows Phone to 8107 in about 15 minutes (after you get all the right files in place) and in fact, we just did it to our Samsung Focus S, mostly because we have a crap-ton of Windows Phones here and can take risks.
We're going to assume you don't have extra phones and therefore we can't really endorse this because:
You may "Walsh" your phone, meaning you'll bugger your chances for future updates (if they ever happen, ahem)
It is a bit stressful
You really shouldn't have to do this, amirite?
Having said that, if you still want to go down this path we can say it does work and if you follow the directions to the letter, you'll have 8107 on your Windows Phone (you just won't have any "tweaked" OEM firmware to go with it).
Once again, we must stress that we're not endorsing this method and we would much rather see AT&T just deliver an update. Should you screw up your phone, this is all on you.
So against our better judgement (and Rafael's ire), we're going to post our tutorial on the subject. Read on, if you dare...