I found a nice little extension for blogengine, which enables me to add my xbox gamercard to posts.

The extension was found here.

Right, so it works in posts, but not in widgets.. something needs to be done ;)

Aha! Got it. From here I got a Literal widget, which will show anything as written, instead of trying to parse it, as the textbox widget does.

Then from here, I got the snippet for showing my gamercard.

And presto! I got my gamercard put into the widget zone on the right, without having to debug why the widget found here, isn't working for me.