I used one of those pieces of ***** for quite a long time-- in fact up to this year, before I finally decided to upgrade to the i7 iMac. They're good enough to run all your simple internet tasks and basic flash, and they can still handle photoshop quite nicely.
I'd definitely use it over a 200 dollar netbook with smaller screen and less powerful cpu.
jsquared, what will you be using the computer for? what does your average day look like for computer usage? What were the specs of your last laptop? Are you planning on keeping the computer for a long time? The powerpc technology is dated, and apple doesn't support it anymore, but it's still a nice alternative for web browsing and light photoshop etc. If you think you might venture into some more heavy stuff, including multiple flash items at once while browsing, heavy multitasking and 3d graphics/ video, then.
The biggest thing to be weary of is apple's stance on the powerpc technology, so if you could, getting an iMac with at least a coreduo or core2duo should ensure you can always use the latest applications and osx (but I never personally missed much without snow leopard and above on my G5)