But this is not the same situation....you iBook didn't have a graphics card that shares the memory with the CPU
Ture, but if you add the 80MB that the GMA950 grabs to the 256MB that I have then that's still well below the 512MB that comes as standard.
I've run as little as iChat, Safari, and iCal and have gotten this
OK… have you considered that there's something else at play other than a direct lack of RAM. For instance, have you installed and system additions that requires Rosetta.
I think that constitutes normal consumer use
Sure it does and even with the integrated graphics 512MB should be enough.
Yes I do agree that 512MB is on the low side of things although if one sticks with Universal binaries this should still be enough for most poeple… even with GMA950. What one does need to be careful with is how they manage their systems in general. You just can't add additions, run Dashboard widgets etc with impunity like you can with more RAM. By the way, the only addition that been added to my iBook system is MenuMeters. Beyond that it's a plain vanilla system.
I'm not saying this is the case for you but you do need to consider that the problem may not be simply a straight lack of RAM.