The Pokemon Global Link service for Pokemon black, white, black 2 and white 2 will close January 14th 2014. There will be maintenance october 1st til the 12th. there's a bunch more news but the official site won't let me copy and paste it here, so i'll leave the link.
[url1ut]http://en.pokemon-gl.com/about/e_notice/[/url1ut]