Hi,
Yes, I'm having the same problem too. I'm using a home wifi with an iPhone 4.
Never had issues before using Facetime until about 7-10 days ago. I ring someone on FT and it connects for a second then says Connection Lost and drops the connection.
I have tried a freind's iPhone 4 on the same wifi and that works fine, so I don't believe it's a wifi issue but something to do with my iPhone.
I've done nothing different to my phone in the last days either, no Apple software updates etc. except the usual daily app updates but nothing to with FT.
Does anyone know a solution to this?