The release of Windows 7 is finally in sight. Microsoft said earlier this week that the new OS will be on store shelves on October 22, and to expect an RTM date of sometime in the second half of July.

From beta to release candidate, Windows 7 moved from build 7000 series to 7100 series. Now information from unofficial channels indicate that the software development team is now working on builds in the 7200 series, though it’s unknown if there’s any significance behind the number bump.

Build 7201 is now available through unofficial sources, such as BitTorrent networks, in both 32- and 64-bit flavors and carries a build tag of “6.1.7201.0.winmain win7ids.090601-1516.”

Microsoft has said that the build 7100 that is still publically distributed is feature complete, so don’t expect significant changes in the 7201 release other than better driver support and slight tweaks.