Is it possible to undelete an account
 

an account was just deleted
is it possible to undelete or any way around it? Get all the lost data back avis sigs etc.?

Nope, once you delete it - it's gone. The only way to recover it is, if you have a backup of the database before you deleted the user or user(s).

any possible way for me to retrive that guest account and give it the old username back?

nope once its gone its gone i believe

Simple answer, No.

Simple answer after Paul's answer, yes... but not without database edition... i suppose you have to wait for your Paid Request to be filled.

This might help if his posts are still there.

http://www.vbulletin.com/forum/showthread.php?t=239925

yeap, this is a way of doing it... :)

When running this query:

So in the UPDATE post SET userid='xxx' WHERE username='Old Name'

Does 'Old Name' equal guest? Cause all the deleted posts are listed under "guest"

no if you run that query and put guest as the old name

it will over right all usernames that are set to guest

old name would be for instace if you had a member called "tommy" and deleted him, you could create a new "tommy" member account and run the query so that all of the old "tommy" posts are shown as the new "tommy" account