Anyone tried multiple (2 or 3) USB2 DVB-T tuners in a HTPC system?

(Using Windows XP, Vista or Windows7)

Thinking of 3 Avermedia or 3 Haupauge tuners.

Have been looking at the new Intel Atom mother boards but they only have one PCI slot and plenty of USB2 headers.

One disadvantage would be the requirement for an antenna splitter thus reducing the signal level to each tuner.

Cheers