Thanks. You are right - I am using vBulletin, vbAdvanced CMPS, vBSEO and vBlogetin.
I used to really hate CMPS until I started editing the code, now it's actually quite flexible (I have 1 module acting as 3, modules changing depending on style, etc).
Basically I modified the module shell template to not use any tables, and had to make minor modifications to all of the stock modules so they are also tableless (though some require tables so I have that as a condition). This isn't necessary though, if you just modify your .tborder, .tcat, .thead, .alt1, etc CSS classes you can make them white.
The news is powered by vBlogetin, using custom templates that I plan to release for the actual application later.
Another modification that really makes it lose the standard vBulletin look is splitting your navbar up. I have the welcome/userinfo stuff in the header, navigation left as-is, and breadcrumbs below that.