Security against hackers

[Les Voorhies]

Hi, For several years i've had a forum for rock climbing, we used Postnuke with a phpBB2 module. Over the last year we've had numerous attacks by hackers that recently led to our service provider shutting us down.

My question is, how secure is vbulletin? Are hackers constantly finding vulnerabilities? Since its likely that the hacker(s) that have screwed with us over the last year will continue to look for opertunities we need a secure easily upgradable program and we dont have anyone highly skilled in these programs.

Another question we have is, does vbulletin have a CMS or some kind of portal similar to Postnuke? we have currently installed Joomla and there is a bridge that can be used with vbulletin but we dont really like joomla all that much.

Also, is there good instructional documentation available for vbulletin?

Thanks