Hi I'm curieus how many members here are using a toolbar ? I don't use any toolbar, because they collect all sorts of private information from you. They also know which sites you have visited. Can be handy for sending spam emails to you, because they see in which sort of sites you're interested in. Check also out my free offer in signature. Greetings Jason
For Firefox, I just use SearchStatus which is good for highlighting nofollow links, showing page rank and alexa rank as well as other cool gadgets. and it doesn't slow anything down For IE (which i hardly ever open) I just have the stumbleupon toolbar.