I do it in other forums and will use the feature as soon as it is available for me here. I posted on another forum and three months after posting I got a click through from my signature. Bobby N showmethefreemoney.info
we come here for knowledge or improve ourselves, why not use 3 sig links, coz it will make our sites noticed.. coz i got over 300 unique visitors a month from DP.... not bad.. for me.
It's a great way to earn backlinks back to your sites. Also helps if your well know on certain forums.
The backlinks the receive help out in off page seo plus the knowledge you learn and give away just help you out. You are bound to learn something from so many like minded people.