I'm not sure what you mean but with my own little experience, at least the top 5 more popular distros are generally Broadcom friendly.
My problem is this: I'm dying to get a Linux distribution onto my computer to make it a dualboot again, I'm wondering if there's any distribution that would be slightly better with Broadcom machinery.
Haven't tried Wubi.
Also, is it only Ubuntu that has the Wubi installer? I tried manually dividing my computer's hard disk once, and Windows refused to accept its part, so Wubi is probably my safest bet.