there still is a lot of work to do though. i think at the begin of project durian blender 2.5 will be useable. at the end of project durian it will be totally awesome.
my current exporters won't work with it. large parts of them will have to be rewritten.
@Ventilator : Well, if you can always use python , perhaps it won't be so difficult ? We just need basic level export (even without lightmaps) and animated character exporter in first time.
In fact A7 would need a real support for FBX : import directly Blender FBX models and characters !