My research is in Munich and a few other German/Austrian locales. I know Munich like the back of my hand.
I hope that you are fluent in German. After many years of doing research in Munich I know that my German is not good enough to teach at the university level, let alone with graduate students. I could probably teach middle school. Also, in Munich, Bayerische is still spoken quite a bit and even if your German is fluent, you may not understand the locals. Knowing German is essential...my main archivist and 2 others at my research institute have very limited English. Your grocery store clerk may also be limited. You will be ok at the library or in areas near tourist. My last landlady did not speak English, but her Russian was fluent.
The local universities are the LMU (Ludwigs Maximillius Univeristät) and the Technical University. Both are strong in sciences. There is also a Fachhochschule for business and technical professions, and a Musikhochschule (conservatory). It would be HIGHLY competitive to get a job at either the LMU or the TU. There really aren't "liberal arts colleges" in Germany. It is a state system of large universities, technical universities, fachhochschule, and specialized institutes such as Sporthochschule and Musikhochschule.
You might be better off trying for a Fulbright or a Humbolt (if you are under 40) or perhaps something from the Max Planck Institute. The DAAD also has funding for Americans.
There might be other opportunities for scientific research in industry. I shared a hotel with some scientists from the US who were working at BMW on an engineering project. There are other companies that might offer an internship. Munich is full of high-tech corporations. They might be more English-friendly as well.
Munich is an awesome city! Get away from the tourists!
If your husband's post doc does not come with an apartment, be warned that Munich is like Manhattan and apartments are expensive and hard to find. Look in Kurz und Fund (I think that is the name of the paper--Short and Found) it is full of ads for lots of things including apartments. I usually book through
www.checkin-muenchen.de/index.php? The Subway system is clean, quick, safe and easy to use. You do not have to live near your work, but it DOES help.
I believe that there is an American School or an International School in Munich. You might be able to teach high school science there, in English. My American friends who were accompanying their husbands to Munich usually taught English in one of the language schools.
Enjoy the Bayerische Staatsbibliothek--the "Staubby"! It is an awesome library.
And pardon my possible spelling errors--it's been a while since I've typed in German. I'm looking forward to going over in May for 6 weeks!
Viel spaß!