It's pretty cool to checkout the main URL for your product on del.icio.us. So far there's 20 links to HelpSpot only a few have comments but those are interesting and I think a nifty way to peak inside what potential customers are thinking about your product.

Here's the one for HelpSpot:

http://del.icio.us/url/ad2c1e68e90e20c46bc8275793237760

My fav comment: "Amazing new IT Help Desk software"

I'm going to dig around on this a bit longer. I think there's probably alot of good market research that can be drawn out of the comments attached to del.icio.us bookmarks along of course with where they're linking to.