Roger,
After viewing a replay, copy the link to your clipboard and paste it to a blog post on your profile ... I use Chrome, so when I play, the game client comes up in a new window. I can leave the game and go back to my profile. If your game client loads in the same tab, you'll need to paste the link to something like Notebook until you finish your game.
You can use the link option in the blog post if you want ... just type in the description of the shot, highlight it, then click the "link" icon and paste in the link address.
Hope that helped!
Kat ♥