Good news cheap people! Windows 7's WordPad (Microsoft's free bundled word processing doc) now supports Office 2007/2008's XML-based Word docs.
The upside is that if you're just typing up really simple things, you don't need to actually buy (or pirate) a copy of Office. The downside is that WordPad only has limited support for these types of docs, and will present you with a warning that it'll strip out some extra content only supported in Word if you re-save. So don't overwrite your co-worker's meticulously prepared presentation with your notes on how she should "spice up those sales figures with more caliente language."
View our other Windows 7 tips and our continuing coverage here.