Next-Gen was under the Imagine Publishing Umbrella that currently publishes Games and Edge magazine in the UK.
http://en.wikipedia.org/wiki/Imagine_Publishing
This wikipedia entry seems a little off though. Imagine was around long before 2005, but I guess the date has to do with merging with other publishing houses.
I was thinking that IGN became Gamespot, but I guess it's still around. I had no idea IGN and Imagine were the same company.
http://en.wikipedia.org/wiki/IGN

