[Zope] How big is the biggest known Zope Web Site ?

[Laurent.Soissons@fr.consulting.fujitsu.com]

How big is the biggest known Zope Web Site ?

'How big' means to me things like :

How many concurrent visitors at a time ?
Internet bandwidth ?
Database size ?
Number of physical servers/processors ?

Another question of big interest to my current project :

Is Zope suitable to manage a 'transactional' web site? I mean a web site
where each different visitor gets pages with different content.

Thanks for every answer !