This month it was mostly price changes.  Some a few dollars and some $10 and $30 changes.  The only changes to the hardware in the lists was the video card and case recommendations in the $250 Upgrade and $500 Computers.  An Nvidia 9500GT was replaced with a Radeon HD 5670.  The cost went up about $20 but I think its worth it.  The 5xxx series supports DX11 and can play all the latest games, just with all the bells and whistles turned off.  The case was replaced with a very similar one only with a higher wattage PSU to allow for the updated video card.

You can find the main parts list page here
http://www.homepcbuilder.com/build-your-own-computer-parts-lists.html