I wonder what the common guidelines for large-scale Sharepoint 2007 Architecture is? Mostly, I'd like to plan how many Site Collections are needed, and why I should split my Intranet into multiple Site Collections instead of just having one to rule them all?
The question that derives from that is what the disadvantages of different Site collections are. From what I see, they can not talk to each other (i.e. the CQWP can not read data from another Site Collection) and I have to deploy my features on every Site Collection.
Are there any good resources and white papers on larger-scale Sharepoint Architecture? I found some stuff which tells me how many servers, but I'm looking for something one level higher, talking about Application Pools, Content Databases and Site Collections.