Adobe - Open Screen Project

Adobe have opened their .flv and .swf formats, according to their release here.

Some key things they're promising:

• Removing restrictions on use of the SWF and FLV/F4V specifications

• Publishing the device porting layer APIs for Adobe Flash Player

• Publishing the Adobe Flash® Cast™ protocol and the AMF protocol for robust data services

• Removing licensing fees - making next major releases of Adobe Flash Player and Adobe AIR for devices free

From the CEO:

A consistent, more open platform for developers will drive rapid innovation, vastly improving the user experience.

My fondest wish in this is that third-party tools will flourish, hopefully making the Flash vs. DHTML/AJAX divide less of an obstacle.
Project Page

Press Release