Cobham have recently released their "Aviator 200 UAV" - a satellite datalink system specifically made for small UAV's.
Although you'll likely need deep pockets to afford one, it shows that the satellite communications industry has realised there is a market for small UAV's that require beyond-line-of-sight communications. As more manufacturers come onboard the competition should start driving the price down.
Datarate: up to 200kbps
Coverage: near-global (uses the INMARSAT-4 satellites). Does not cover the Arctic/Antarctic regions.
Power usage: 28W
By having this sort of technology, operating small UAV's over longer ranges become much more practical and safer, via the presence of a reliable and high-bandwidth datalink that is not range constrained.