Google can now do a victory dance since they now owns the domain name that has the same name as their AdSense service. The previous owners of AdSense.com was AdSense Consulting. Here is a screenshot of the AdSense.com website before Google got a hold of the domain name and re-directed it to the Google homepage via Archive.org:

Here is the recent history of AdSense.com:

• October 16, the owner was still AdSense Consulting
• October 23, the domain was transferred to MarkMonitor.com
• October 31, the domains registrant was set to “Trout & Zimmer”
• November 1, the domain was officially in the hands of Google

Source: [ZDNet blog]

ZDNet also states “MarkMonitor.com is hired by Google to manage their domain inventory — registering new domains for upcoming products and gaining possession of domains that are already taken.”

Currently, AdWords.com, AdSense’s complementary service redirects you to the AdWords page of Google. As for AdSense Consulting, it appears that they have moved to AdSense2.com.