Tips: "service unavailable right now. Check back in a little while" when connecting to MarketPlace on WP7

You try to connect to Marketplace or initiate a download on your Windows Phone and the error above is displayed?
Open your browser on your computer and sign-in to www.zune.net and signout. Launch MarketPlace on your Windows Phone again and you should be good to go.

The same error in French reads like this:

"Nous ne parvenons pas à obtenir cette info. Ré-essayez dans quelques instants."

Sent with my Windows Phone 7