FIM Oracle MA
If you're struggling to configure the Oracle MA in FIM, there's an excellent guide to installing the Oracle client on a Windows server here.
I struggled even with this guide; I downloaded and merged both sets of driver files, created environment variables, and ran the ODBC_install app which flashed-up a dos box breifly, but gave no indication whether it had worked. When I ran the Windows Data Sources (ODBC) tool and tried to add a new User DSN, no Oracle driver was listed.
Turns out that the Oracle Drivers are 32-bit drivers; there's no 64-but version. And on a 64Bit Windows server, the Windows Data Sources (ODBC) tool lists only 64 bit drivers. You have to open a command prompt and specifically run the 32bit version of the Windows Data Sources tool:
The Oracle driver will be listed; select it and set-up your odbc connection as usual.