My favorite warrior blog is http://www.tankingtips.com/, written by a good friend and my blogging mentor Veneretio (who just happens to be a fellow tankspot author). One nice thing about it is that he also covers a lot of general tanking theory as well, some of which I have been able to apply to my druid.
One example is http://www.tankingtips.com/2009/02/24/the-trash-caps/.
For trash mobs (level 82s), the hit and expertise caps are:
177 Hit Rating (5.4%)
22 Expertise Skill (5.5%)
Thanks to Satrina (tankspot moderator) and Vene for bringing these numbers to light.