When we just started utilizing WPF we didn't like the way converters had to be created for every little thing you wanted. We looked into using jscript for this after a forum post by Jonathan. At that point, we decided against it. However, he went ahead and created a fantastic package which hasn't had enough exposure imho. So take a look here.

Basically, it will let you create inline code for simple converters. I wish I could use that now!