Actually you don't need foetuses for stem cells any more. Nowadays you have iPS technology (induced pluripotent stem cells) where normal, differentiated cells can be forced to regress to a stem-cell state. And also we have things like cord blood banks and stuff...rich sources of stem cells.
It's a great first step I think. The main hurdle is the fact that HIV replicates in immune cells. The ultimate cure would be if we could disable the virus' replication programme without killing the white blood cells harbouring them.
It's the nature of my circuitry.