Maximum recommended is 200 documents per folder. However, it is possible to store up to 3,000 documents per folder if rendering time is not a gating factor.
Chapter 10
Default SharePoint Portal Server Installation
For information about how to enable or disable Web discussions settings for SharePoint Portal Server, see "Typical Web Discussions Configurations" later in this chapter.
SharePoint Portal Server stores discussion items for documents in two locations, based on whether the document is located inside or outside of a workspace on that server: Document stored in the workspace: http://Server_Name/Public/Workspaces/Workspace_Name/System/Discussions Document stored outside the workspace: http://Server_Name/Public/Workspaces/System/Discussions
Chapter 11
Supported Browsers (dashboard site/Web access only): Internet Explorer 4.x and later running on the Windows operating system Netscape Communicator 4.7x running on the Windows operating system