IP address and GeoIP is pretty handy from a support perspective, plus anything such as ISP that can be inferred from IP address. The whatismybrowser.com has IP

IP address and GeoIP is pretty handy from a support perspective, plus anything such as ISP that can be inferred from IP address. The whatismybrowser.com has IP address but not the GeoIP. More generally an embeddable 'contact us' form for people to use might be useful if it solves problems of having to setup captcha, email and so on that is hard to do correctly. On the back of the contact us form there could be all the useful support gubbins so that whomever is in support dealing with the 'complaint' sent on on the contact us does not have to ask the customer to go to some third party site to find out the browser/IP/screen size and so on.