Pfff. 13 users are much more than my pet project (http://www.DNSDigger.com) has. It is a couple of years old but i recently started with paid accounts and API-access.
Yes. If you put in a Google Analytics code the site will show you what other site share the OwnerID-part. Same with adsense (and soon AddThis).
I am not a designer and the first thing i would do if i had some money over would be to hire a designer to make my site look more pro.
Thanx! Yes IPv6 support should be implemented soon (within this year). But as i am not actually making any money at all right now (i suffering from depression & ADD) i have problem scaling the site with the much needed extra hardware and design. This is something i put together first for fun and now it has grown a bit hehe. To be able to serve the data i do i have to resolve hunders of millions of hostnames/domains and spider the net. That takes hardware, software, time and bandwidth which i only has time of hehe. Looking for sponsors when you are trying to be a commercial service is a bit hard but if anyone here has a hosting company that could give me access to dedi and/or VPS (low outgoing bw and HIGH incomming) i would love to trade "powered by COMPANY" and maybe banners.