Looking at Sandbox:Family connections, when it becomes a real page, it seems like we may need a note on the couples section, i.e. "Together at the time of their Muppet involvement." Several (Shields and Yarnell, Kristofferson and Coolidge, Moore and Willis) later divorced. Karen Prell and Mike Quinn were married for a time but aren't anymore. I haven't added them yet but it would fit with the others.
And what if someone has had multiple spouses with pages on the Wiki? Brian Henson is listed along with Mia Sara but not first wife Ellis Flyte. Maybe include subsequent spouses in parentheses (i.e. "later So and So," rather than exact dates)? It's just a little trickier than siblings and parents/children.
Hey Martin, looks good! They're welcome additions. I can see your progress with wiki editing with each new edit, so I'm glad you're figuring it out. Are you primarily using BMI and ASCAP for composer credits?