Has anyone thought to build some themes that work across XOOPS and SMF forums?

There is a bridge on the SMF site for Xoops.

Personally, I just build separate installs. Keeping up with upgrades is difficult, because you are dependent upon too many people when either product upgrades. I think it is critical to upgrade when they become available, especially those upgrades that deal with any security issue.

I could definitely appreciate some integrated themes that looked the same on SMF and Xoops.