Just read some sad news for any geeks who like this series as much as I do, the current season being air'ed on Sci-Fi channel in the USA (Season 5) will be the last one for it :(
There will however be some DVD/Blu-Ray movie versions of it coming out like they did with Stargate SG1 which is something...
I don't fully get why they are doing this as the series rates really well and I'm sure I read somewhere its one of the most downloaded programs on bittorent.
ref: www.gateworld.net