Word 2010 - Registry Key for AutoCorrect Options
Those keys apply to Excel, PowerPoint and Access, I think, since the equivalent group policy settings do.
There are group policy settings for these in Word, I can only assume this is because people may want different settings for 'real' word processing than the bits of text editing in the rest of Office.
There don't seem to be any equivalent "non-policy" keys The equivalent paths to policy settings are below, but it would be easier to set these through domain or local security policies than through registry changes.
Correct TWo INitial CApitals
software\policies\microsoft\office\14.0\word\options\assist\fTwoInitialCaps_24_1
Capitalize first letter of sentence
software\policies\microsoft\office\14.0\word\options\assist\fInitialCap_32_1
Capitalize names of days
software\policies\microsoft\office\14.0\word\options\assist\fCapDayNames_48_1
Correct accidental usage of cAPS LOCK key
software\policies\microsoft\office\14.0\word\options\assist\fCapsLock_40_1
Replace text as you type
software\policies\microsoft\office\14.0\word\options\assist\fCorrectTyping_16_1
Correct keyboard setting
software\policies\microsoft\office\14.0\word\options\assist\fCorrectkeyboard_64_1