I'm badly in need of a new laptop for work, but still thinking of holding out until the January 27th announcement in hopes that there are new models unveiled. So it is worth considering: is there usually any gap between when new MacBook Pros are announced and when they're actually available for purchase? Might they be hard-to-get at first, or do I just watch the big event at my local Apple store and tell the geniuses "I'll have what Steve's holding."