What tools do you use to develop Oracle stored procedures, in a team :
Using Oracle SQL Developer 1.5, you can easily create and manage connections to CVS or Subversion. To create a CVS connection (for example), click Versioning -> CVS -> Check out Module. You will run through a wizard to create the connection (host, username, etc), then you can check your procedures/functions out and in as normal.
Integration with CVS is also provided in Toad.