WP7 is here, well nearly. The final dev tools are done and dusted. The marketplace launches in early October and phones start selling soon after...
Download the tools (uninstall any current version you have).
Silverlight for Windows Phone Toolkit (really nice add in controls for gesture handling, pickers and wrapping panel layouts)
The announcement (worth reading the whole thing).
New Demos: Netflix, Twitter (at last!), Flixster, OpenTable, Travelocity
Advertising SDK, easily integrate ads into your free/trial apps