CB ProfileGallery, CB GroupJive, and CB Activity are our only plugins that have not received a CB 2.x upgrade. I'll be upgrading CB ProfileGallery next, followed by second pass for CB ProfileBook, then CB Activity, and finally CB GroupJive. A compatibility chart for our plugins can be found below.
www.joomlapolis.com/cb-20-addon-status
We can not help you with any 3rd party incompatible plugins. For those you should contact the developer for new releases.