MOSS 2007 Limitations

Virtually every application has some type of limitations and Microsoft Office SharePoint Server is no exception. However, I think you will see these limitations are such that they will have little impact in you environment.
Site Collections in a Web Application	50,000
Sites in a Site Collection	250,000
Sub-sites nested under a Site	2,000
Lists on a Site	2,000
Items in a List	10,000,000
Documents in a Library	2,000,000
Documents in a Folder	2,000
Maximum document file size	2GB
Documents in an Index	50,000,000
Search Scopes	1,000
User Profiles	5,000,000