I hadn't noticed, but did login to store.service-now.com and do not see an app. I'm not sure why, but they totally abandoned it. I even asked for the code if they weren't going to support it going forward. Nothing. I do understand it is a commitment as we upgrade ServiceNow twice a year. Ours stopped working after one of the upgrades and hasn't worked since.
I have accomplished this by using (and modifying) the Additional General Information extension. It is fairly easy to add additional fields to the extension and pull the information using WMI. I have added DHCP Server Address, DHCP Enabled, IP address (WMI pulls both IPv4 and IPv6), DHCP Server Address, and Domain Name. Code located in the Forums here: http://forum.screenconnect.com/yaf_postst9419_Extension--Additional-General-Information.aspx
Customer support service by UserEcho