That’s what BusinessWeek says according to Dell employee Ggroovin who says on his Twitter page he "works at Dell, created @DellOutlet & help w/ Dell's Twitter strategy”. Groovin indeed!
Half a mil…nice. I bet Twitter wishes it was getting a slice of that pie.
The whole article (Beyond Blogs) is actually a good read with folks like JP Rangaswami and Steve Rubel quoted and parting shots from Jeff Jarvis and Arianna Huffington.