Well I have made the change, i got my first mac there, I have always used a PC up to now, normally with some flavour of linux or windows on it, so there was always going to be a bit of a learning curve. Well i was pleasently surprised with how little of a learning curve there actually was. Within a few hours i was able to find my way around the various menus of OS/X. I am still by no means an expert but getting to a stage where i am comfortable with the OS.
The biggest aspect of the mac to get used to is the difference in keyboards on my new macbook. the buttons appear to be in a slightly different position, and sometimes typing the letter doesnt appear. I think this might be something to do with some setting, perhaps.
Another slightly annoying aspect is the jagged edges of the computer - this makes it look good but does nothing for your wrists - cuts the arm off you.
Anyway, that is mac week one down - now for some serrious work on it, as i have a conference in Hannover.