no, they are currently airing season 8.
apirl 2009
Smallville season 10 has not yet been given a air date for the UK but will air in the US on 24 September 2010.
The US DVD was released on September 7, 2010 Smallville season 9 will be available on DVD mid-October in the UK.
Season 2 hasn't finished airing in the US. Season 2 is also currently airing on MTV in the UK. Season 2 has completely aired in the US and UK, and will be returning to the US on June 5th. The UK should get the season by June 15th to MTV.
October 2009
Yes, new season started airing in the US on September 14, 2010.
sometime next year(march-june)
Yes. Season 5 is currently airing in Canada and the US. However, it was announced that the fifth season would be the final season in the series.
As of March 2008, there is STILL no confirmation of when E4 will be airing Season 7... Best guess would be sometime between now and summer 08, but seen as E4 seem to have no regard for the Smallville franchise (they are currently running Big Brother USA instead of Smallville!), who knows when we'll see it... Season 8 has just been commissioned in the US, so we'll be 2 season behind before too long...
I'm not sure when it begins airing in the US but I know that you can start watching season 3 on casttv.com.
they will begin airing July 14 in the us it also says on the avatar page on nickelodeon it was also discussed at the last comic con ande it also says on avatar spirit.net
September 9th, 2008 in the US. It has not been announced anywhere else yet.