I had a question from a customer yesterday about how many copies of Business Intelligence Development Studio they get when buying SQL Server 2005.  

The answer to this question is as many as you like.  The install CD that comes with SQL Server can be used on any number of development boxes, and you can do a "Tools Only" setup which installs Business Intelligence Development Studio and other tools to help develop and test database apps and of course reports.  The developers could then connect to the main SQL Server when grabbing UDM's and publishing reports.