Can't find linked server in management studio?
In SQL Server 2000 when you create a linked server then you can see that on Enterprise Manager under Security --> Linked Server. One of the Developer asked me how we can find same in SQL Server 2005 Management studio, here it is:
You will find under Management studio open connection against that SQL instance and see under Server Objects --> Linked servers.
For further reading on creating linked server against Oracle or any other data source refer to in addition to the books online examples look at:
http://support.microsoft.com/kb/280106
http://www.sqlusa.com/bestpractices2005/linkedservertooracle/