Gotta love the discoverability of PowerShell. It is so easy to find out what the platform can do for you, all without looking at the documentation.
Today I was importing a FIM Sync configuration using the trusty MIIS.MA.Config PowerShell snap-in (that has been around since ILM 2007, and still works with FIM despite the legacy name!). I tend to press TAB instead of typing full command names in PowerShell, and this morning I pressed TAB too many times and to my surprise there was a new command!
This new cmdlet allows scripted configuration of a FIM MA, including setting the password. This is one of the new things that I had not been automating in my deployments, and now I can get to 100% automation for more scenarios.
BTW – I assume this cmdlet is only in the R2 version of the snap-in.