I went through the steps to get eclipse working with the beta 2 plugin found here: http://forums.adobe.com/message/2343041#2343041 but I'm unable to get the perspective to show up.
Chris mentioned in this reply http://forums.adobe.com/message/2332788#2332788 that an error in another installation would prevent FB from being added. I found an error in another installation (Resource Monitoring Common Feature). After googling around I'm still not sure how to fix it. Do I need to reinstall eclipse from scratch? Configuration screenshot attached.
I am having the same difficulty. When I run the Beta 2 plugin with existing eclipse I can see the Flash Perspective. When I run my existing copy I do not see it. I do, however, see the Flash Profile perspective available. I looked at my configuration and everything seems to be configured correctly and not showing disabled like your plugin so I'm not sure if we're having the same issue or not.