Thanks! I think it comes out of my failure to understand what "marry me" exactly means, so I a bit mischievously took it literally as if a big Boomer fan was so mad about him s/he would love to live with him. I think you got the Prairie in-joke? Dang, explaining jokes always makes them look bad, doesn't it? Anyway, I don't actually know what "marry me" would mean here.
This is the last we have heard of him, producing and writing the pilot (first episode) of a planned series 'The Karenskys' in late 2008, early 2009. Sadly, he didn't manage to persuade the studio (CBS) to film the rest of the series, so it was aborted.