I'm still going to do my work in away3d and I'm not doing this to promote alternativa but just in case anyone wanted to know (just for the sake of knowing), alternativa has changed their business model (or so it would seem) and it's free to use the engine if you simply provide a link on your website. Not open source, can't decompile etc but still free. Apparently they're working on developing an IDE, which they'll probably charge for. Personally, I'm trying to get a readblend utility working in AS3 for use with away3d, which would essentially turn blender3d into an IDE for 3D dev using away3d but the blend file format is rather complex and it'll take time. This way you don't have to export a ton of files/scripts/textures you just save your blender file and load it into flash + away3d 4. Anyway just some nfo for people who might want to know!
Source: http://forums.adobe.com/message/3647171
