You can use the code below to highlight your link in some free for all sites. This code will not work on all free for all sites, but if you scroll down the page and see some links already highlighted, you'll know it works. Instead of typing in your web address, place the code below, with your web address, into the free for all form.

http://www.yourdomain.com/" STYLE="background:yellow; color:black

You can change the colors to whatever you'd like, but keep in mind, the text must be visible on the background color.