Yes..i would LOVE to have this as well. I see that there is one offered her on these forums but its for an older version of Vbulletin. Can someone or has someone created a version for the latest version of vBulletin?
here is a free cpanel email signup addon for sites running cpanel. it works good, lets guests create their own accounts and everything.
can some1 integrate this into vbulletin and its templates.
Please do not attach source code that is not yours, or that you do not have permissions to redistrubte. I did not see a license in the zip file for the code.