In an effort to unburden my wife's PPC MacBook Pro I just tried Safari
AdBlock:
http://burgersoftware.com/en/safariadblock
and something called clicktoflash:
http://github.com/rentzsch/clicktoflash/tree/master
I haven't put them on her computer yet but they seem to work perfectly
on my Intel MacBook.
The click to flash puts the word Flash in the box where the Flash will
play. If you click on it, it will play.
She tends to queue up dozens of tabs of stuff she wants to read, which
can max out her CPU.
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