Macbook Pro doesn't work with Time Capsule

Time for a vague problem. Yesterday I splurged on a new MacBook Pro 15 inch. But I had huge problems getting it to connect to my wireless network at home. And I am not the only one. Turns out it is incompatible with Time Capsule’s default setting! Argh!

If you leave the Time Capsule in its default setting (802.11n with b/g compatible) I can’t connect. When I change it to be 802.11n/a compatible, I have zero problems. Dang, and my iPhone will only connect to b and g! Seriously screwed here.

Also, I wonder if I should set the Time Capsule only to 802.11n. But then I don’t know what to choose, 2.4 GHz or 5 GHz. What’s the difference? (besides the modulation)