Is it possible to have something like <span style="background-color:#ffff00;")send this text to twitter</span>. If it is possible, then you need to accomplish putting a background color on the tweeted text.
First person to do this for $30 wins the job...
Turns out the piece for Twitter was really trivial, I was able to do it in 15 minutes myself, however I have not tried (nor have the time) to do the same thing for Facebook's ("What's on your mind?" comments box), and for MySpace etc.
Please make sure that you can do it for those. Thanks.