Hi atn,
I'm not sure if it solves any of your problems. But here are my two cents.
I put a little service together which synchronizes 37signals' Basecamp directly with OmniFocus. Have a look here
http://www.spootnik.net/faces.html for some inspiration.
You can create two Basecamp projects (work, home), synchronize your OmniFocus databases on your Mac with either of them and your iPhone OmniFocus database with both of them.
The drawback is that you need a Basecamp account and three Spootnik accounts. Thus, it's maybe a bit complicated.
Spootnik is currently in private beta. If you like to test-drive it you can sign up here
http://www.spootnik.net/signup.html and join the private beta crew.
Best regards,
Lars