http://appleinsider.com/articles/13...over-cellular-to-all-customers-by-end-of-year
AT&T does not restrict Facetime over cellular anymore.
As for Youtube, I recommend you download the tweak "Youtube No Ads/HQ3G"
It blocks ads and allows you play HD videos through cellular, essentialy the same thing as 3G Unrestrictor for Youtube.
I'm sure 3G Unrestrictor will get updated soon but in the meantime I recommend you go with the solution above^.