Saw this recently via the OnStartups blog run by HubSpot founder Dharmesh Shah.
I have blogged/tweeted about HubSpot and their work on Inbound Marketing before, and was interested to see this news. I know that Inbound Marketing works, from personal experience. Google the term "Inbound Marketing" to know more, and check out HubSpot's products and services.
- Vasudev Ram