XF 1.3 Integration?

Right now I am trying to decide if I should switch my forums to XenForo or keep them with IPB. The primary reason is that IPB has IP.Content which allows me to create databases and put data in them. XenForo really does not have such a utility right now, and I have to rely on third party addons for the functionality. I tend to want to stay away from third party addons because they can stop being supported at anytime, possibly poor code, and potential breaks when xenforo updates.

With that in mind, I have tried to find some information in regards to how to integrate say a simple php form outside of XenForo as a forum topic, or allow for XenForo to link to seperate database?

Anyone have links to such information?