[Forrest]

First two seem fine, though I don't have a Google calendar setup.

The last three could be problematic. The goldrush one locks up OW (SBBOD) when I hit "Load All Images"

The BBC site also has potential to cause some problems. But the last link contains over 100KB of javascript. Typically one finds CPU cycles getting sucked up from poorly written JavaScript or from poorly built Flash elements and Flash ads.

I'll leave those links open on my machine and see what happens.