There's a new laptop on the block.
Apparently, the "MacBook Air" was just announced at MacWorld. It's only 3 pounds, no spinning optical drive. It doesn't have a built-in ethernet port, if you need that feature, you use a USB ethernet adapter.
I have to say that this goes to my top 3 next laptops just because I always loved both of my iBooks. The reason that I got a PC laptop the last time I bought a new laptop was because I was tired of not having browser plugins because I was running PowerPC Linux. There are many companies that distribute binaries of their software products, like Flash players and Adobe pdf reader for Intel Linux, but not any other processor brand. But now that Apples run Intel CPUs, that's no longer a problem.