If you are a fan of tabbed browsers, checkout iRider.  It's not free ($30) but it is a sidebar-based browser that works pretty good.  It also will load several pages simultaneously.  Even if you don't like it, you can at least simulate how browsing experience changes when connection speed and server capacity becomes infinite.  It's pretty addictive stuff.  BTW, iRider sucks up a lot of memory when large number of pages are loaded simultaneously.

One of the example iRider Book (page set) contains pages from NASA Earth Observatory.  You gotta check it out even if you don't want to try iRider.  Amazing pictures (it's at its best when using iRider, trust me)!  I am happy that some of my tax dollars made those pictures possible.