And if Virgin offered one, I'd have one tomorrow.
The problem with most large companies is their killer products never get pushed to market properly, and their junk gets foisted on everyone no matter what.
Seriously, T-Mobile, Virgin, whoever can runs my damn phone that's on the Virgin network, gimme a femtocell and I'll pay you £50 and the privilege of free use of my broadband to do what your back-end radio network should be doing anyway, just for those 100 sq.ft that I call "the ground floor of my house" that I can't get a signal on ANY network whatsoever.
I wouldn't even care about the occasional outage, to be honest, that's just part and parcel of living in a modern world reliant on technology to be 24/7. 99.9% would be more than good enough for me.