Pretty good... it's being tested on ~100 sites currently. It's an extension of our in-house advertising system. The short version is it allows site owners to sell ad space on their site with a full-blown bidding system (supports banners, email ads, inline keyword based ads, CPM, CPC, geotargetting, the ability for an advertiser to target just a specific area of your site [for example maybe a web hosting company only wants to target a Web Hosting forum on your site], handles things like spend caps on a per ad/account basis, etc.) It's everything we wished AdSense/AdWords would do (or let us do).
Originally we just made it for digitalpoint.com only, and our ad revenue vs. AdSense went up 400% without any additional ad placements. We rebuilt it so digitalpoint.com is really just a site in the system... that way other sites can use it too.
The other cool thing about it is there ends up being zero risk for site owners because you can set your Digital Point Ads to backfill with your AdSense (or any other ad type) when it has no internal ad sold to deliver.
As I said, more or less just testing it now, but you can check it out if you are bored:
http://advertising.digitalpoint.com/ For some of the advanced stuff it does, it requires specific platforms along with a plug-in (for example so your site can report the "sections" it has for advertisers to pick from or pull a list of keywords being bid on for the in-line keyword based ads). Currently supported platforms that I've made the addon needed for the advanced stuff is WordPress 2.5 or higher, vBulletin 3/4, MyBB and XenForo. For sites that can't support the advanced stuff, they can still use it for selling banner space just with a JavaScript insertion.