Easier Bit Shifting Tutorial

I think Mellis did this
http://hlt.media.mit.edu/wiki/pmwiki.php?n=Main.AVRProgrammingAdvanced

Its brilliant
It explains bit shifting DDRB Port Numbers etc in a way that helps us newbies get a bit of a grip on such stuff rather than just sitting back lost while the more advanced members parade their expertise without much explanation.

This deserves to be a sticky somewhere if it is not already