There's a new version of WL Writer, so I spent a little time updating my Gamer Card Writer Plugin. The big addition in this version is support for the different card styles from MyGamerCard.net. Also, I added a preview, so you can see what the card will look like before you insert it into your post.
Rather than post it here, I submitted it to the Windows Live Gallery, since they've added an area for Writer Plugins. You can download it from there.