I voted new homebrew but it's going to be based on the 'points of light' concept. I'm incorporating Ptolus in as one of the cities. After all, I paid sixty quid for that book!!! I love city adventures and it's a great example of how to do it right.
The idea is that I'm incorporating lots and lots of the standard backdrop, so I can slip in Razortear and all that other good stuff outlined in the Wizards Presents books. I simply don't have time these days to come up with a complete campaign, and I really like 'points of light'. It always bugged me how civilised D&D settings appeared to be.
That's one of the great things about Middle-Earth in the Hobbit and the Lord of the Rings. Going out of the Shire was really, really dangerous.