Thanks for the tips - I've used the FTK Imager program but didn't know about their password product. I just looked through the user guide and didn't see that their tool does Office 2007 docs though.
I'd not heard of Paraben before but just looked at their products. If I need to go commercial I'll probably lean towards the Elcomsoft tools since they seem to be cheaper, unless someone has a reason to avoid them. I'm currently trying their Office recovery tool in demo mode, using a series of dictionary files. Their brute force portion is pretty limited in demo mode, but the dictionary mode is available.