Kenneth
Just to pick up on this point you made:
"We" do use BITs quite often. They are a nice small data type where I can fit 8 of them into a byte. Unless you have a good reason not to use them that I've never heard of I think I'll continue to not waste disk space
My understanding is that this is the behaviour of the Bit field type anyway - is there a reason why you would do your own packing into a Tinyint?