I asked a Microsoft contact about this, as I also couldn't find anything to
explain what it is. Here's what I found out:
Office Professional Hybrid 2007 is an OEM medialess sku. Basically, the OEM
(Original Equipment Manufacturer -- the computer manufacturer, for all
intents and purposes) can make one drive image with the Hybrid sku, and the
customer would activate one of these 4 Office options, depending on which
key they are given/purchase:
1. Office Basic + Office Pro 60 day trial. (The Pro features and apps go
into reduced functionality mode after 60 days. But the Office Basic apps /
features would continue to work.)
2. Office Small Business Edition + Office Pro 60 day trial. (Same as
above -- the Pro features/apps go into reduced functionality after 60 days,
but the SBE apps/features continue to work.)
3. Office Pro (the full installed Office Pro)
4. Office Pro 60 day trial.
So the "Office Professional Hybrid" is not something that an individual
would have access to.