Yep, macs don't need to be shutdown very often at all. I only shutdown for planes, and only restart after big updates or the very very occasional crash i've had. I guess i must have an average uptime of about 2-3 months on my laptop, which is more than 3 years old. With apple laptops, one of the joys is when you need to leave, you just shut the lid, chuck it in your bag and go, and it amazes non mac users when you arrive for a meeting, open your laptop and are typing literally 2 seconds later (i get impatient waiting the other 4 seconds for my wireless to find the local network).
Enjoy!