I use (and LOVE) SPB Phone Suite:
http://spbsoftwarehouse.com/products/phonesuite/?en
It is a great little app that has a nice today plugin, allows photo dialling and allows you to set up profiles and rules, based on time, calendar entries, or other things (plugged in, bluetooth, etc).
I use it every day and it is great at auto-switching profiles. I really recommend this one.
Also, if you are using Mobile Shell, it integrates into that as well.
It also comes with a call filter, which you can use to set white lists or blacklists, also based on times or calendar entries.
The only negative at this time is that there is not an easy way to backup your settings. It is quick to restore it to the way it was, and they say that is a feature they are working on...if that happens, this app will be perfect!
You can get a free trial at the address I listed above.
Hope this helps.
-David