WordPress Bridge

[Gravy Code]

Is there any good WordPress bridge out there or not? I've had a look around, but I've had not luck.

In the latter case, I'd probably try and write one up my self?
Just a simple one where you sign up or log in via vBulletin and you are also signed up for WordPress automatically.
If you sign in or out of vBulletin you are also singed in and out of WordPress.
It would also update WordPress account details when vBulletin account details are updated.

1) Would such a bridge interest anyone else?
2) Would you be willing to donate anything if I built and released this? How Much?
3) What else other than sign on/off and registration do you think would be important in such a bridge?
4) Any other comments?

Thanks,
GravyCode