Looks like Dark Forces Team has done it again. Just last night we reported on how they managed to flash the RTM build of Mango (7720) on an HD7 and now today, they've released RSPL/HSPL tools need for flashing custom ROMs.
These tools won't be of much use to you regular folks out there, but instead are meant for those daring and brave ROM Chefs (a term we haven't used in about a year), who want to flash their own versions of Windows Phone 7 to their devices (first generation). It is currently limited to only HTC phones, specifically HTC Mozart, the HTC Surround, the HTC HD7, the HTC Spark/Trophy, and the HTC 7 Pro, but no love the for the Sprint Arrive nor Verizon Trophy.
It's a big step in many ways, even if more symbolic, just because of the difficulty in working with Microsoft's more "locked down" OS and bootloader. We say symbolic because we're still not too sure how much of a market there is for custom ROMs--bloatware barely exists and can be uninstalled, there are few if any differences in builds, etc. So it remains to be seen what this willl actually bring to the table, nonetheless, we're a bit excited to see what devs can come up with.