Thats right folks, the Syfy channel (which has been in a downward spiral ever since Comcast bought out NBC/Universal. They cancelled Stargate SG1 after season 10 (which should have gone at least 1 more season), Stargate Atlantis got the axe next which could have gone at least 1 or 2 more years before getting stale. Then it really came down last winter when they cancelled SGU and Caprica, in SGU's case the actors found out from their fans via twitter before the network could let them know. Now syfy is at it again, they have cancelled their "golden child" Eureka which is airing season 4.5 right now and will air season 5 next summer. Warehouse 13 and Sanctuary both got picked renewed for their 4th seasons.
At this point Syfy/Scifi has yet to ai an original scripted drama for more then 5 seasons (even though SG1 was on its 10th season total, only seasons 6-10 were on SciFi).
Source: GateWorld » Syfy cancels summer veteran Eureka
GateWorld » Syfy renews Warehouse 13 for Season Four