Clearing Sql 2008 Management Studio Saved Passwords

In Management Studio 2005, the saved connections, usernames, and passwords could be cleared out by deleting the mru.dat file. However, in SSMS 2008 there is no equivalent data file. A similar effect can be achieved by deleting the SqlStudio.bin file. This will affect other settings, but for now it's the best solution.

In Vista, this file is located at:

C:\Users\{username}\AppData\Roaming\Microsoft\Microsoft SQL Server\100\Tools\Shell\SqlStudio.bin

And for XP:

C:\Documents and Settings\{username}\Application Data\Microsoft\Microsoft SQL Server\100\Tools\Shell\SqlStudio.bin

Aaron Bertrand has blogged a bit more about this here.