How I do it is thus :
click view on the replay in ur list, a new game window opens up, don't watch it, just click share, and then click the green copy button, this writes theURL to ur clipboard.
Then go into ur profile blog and in ur message type anything like "brilliant shot", highlight it and click the infinity looking button which is insert/edit link, paste in Ctrl + V, and ur replay is in ur blog for evermore.
I'm sure there is an easier way, but this works.
brilliant shot