Russian website Wzor.net has posted what is claimed to be the timetable for Windows 7's path to RTM:
Here's a clumsy translation (via NeoWin):
FINAL ROADMAP FOR WINDOWS 7 [CLIENT-SERVER]: 6/1 - 6/19 BUILDING RTM ESCROW - already assembled RTM ESCROW. 6/22 - 7/10 RTM RECALL - assembly and search for candidates to the final RTM release. 7/10 WINDOWS 7 RTM FINAL BUILD TARGET - build day "gold code". 7/13 WINDOWS 7 RTM SIGN-OFF - the date of signing the final RTM release!
Is this legit? I can't be 100% sure, but it does fit in well with information I've been getting from several sources, both within Microsoft and from the OEM channels.
Microsoft, as expected, isn't saying much.