[HD2 General] sirphunkee:
No problem!

Most of the HD2's built or shipped in the past 2 months have the newer ROM on them, but even if yours doesn't then yes you can just go to the T-Mobile site and get the newer one.

Both of the stock ROM's have the radio(s) included, so you don't have to worry about it if you just stay with one of those ROM's. If you flash a custom ROM it (usually) won't have a radio included, it'll just use whatever radio was already on your phone (i.e. whatever one came with the stock ROM originally). You can flash to different radio versions....ONLY ones that are clearly labeled as being compatible with the US HD2...doesn't matter if you're running a stock or custom ROM, but it does require HSPL first before a radio can be flashed.

The original stock T-Mobile US ROM (yes, the one I'm running currently) is 2.10.531.1 ("2.10" for short), and the newer one that's been released is 2.13...so that pic you linked there just shows the stock upgrade utility about to upgrade a ROM to the new version (with an included radio).

You can tell what ROM/Radio is on your phone by reading the little text that appears on the bottom of the screen during bootup, and you can also access that info through a settings option once the phone is running.

"WWE" = "WorldWide English"....just means that I have an english-based ROM. Other languages are available by applying ROM's specifically built for that language, but I honestly don't even know if any exist for the T-Mobile HD2, I think they're only available for the euro model.

Since it's very easy to flash the upgraded stock ROM, if your phone comes with the older one I would just suggest running that for a few days and see if it gives you any headaches....if so, then just go ahead and flash to the newer one. There's a number of threads in this section that discuss the differences in the stock ROM's, and the advantages/disadvantages of each. Regardless of which stock ROM you have, the process to flash to a custom ROM is the same either way (HSPL, etc).

HSPL is "permanent", in the sense that it remains on your phone until you manually flash a different HSPL (like flashing back to stock SPL should you need to return the phone for warranty reasons). Once you have HSPL (yes, a hard bootloader) on your phone (HSPL3 being the latest/best to use), you can flash all the different custom ROMs or radios that you want, without having to apply HSPL again.

There a bunch of different things you can to to tweak a stock ROM, or to futher tweak a custom one, and BsB is just a nice tight convenient collection of some of the more common ones. I use BsB and don't have any issues related to it, but I also skip a few of the settings in it ("tap time" for example) that have caused issues for other users. Besides BsB, I also use HD2Tweak, JWMD Icon Changer, CHT/CHTE, as well as a whole list of other stand-alone tweaks that come in the form of cab files, or manual registry hacks...some are related to performance or function, while some are strictly visual or style tweaks.

I originially thought the same (that Android ran in parallel with WM and that was causing the batt drain), but from what I read it actually shuts down WM when it runs, so I guess that isn't the cause of the drain...but honestly I haven't been able to keep up with all the finer details of the Android porting that's going on. And yes, a version of Androd that will load straight to NAND at bootup is the final hurdle I was talking about, and that's exactly what a number of dev's are trying very hard to make happen....I suspect that a breakthrough in that is right around the corner, but I'm no dev so take that with a grain of salt!

Hope that helps! It will be a lot easier once you have the unit in-hand and can play with it yourself. Also be sure to look over this thread (if you haven't already): http://xdaforums.com/showthread.php?t=663845