Google Chrome as announced yesterday is a new Google project. A WebBrowser that follows a new approach. Instead of using one process for the entire browser Chrome uses a process for each and every browser tab. So in case a tab hangs because a script fails to execute properly only that tab hangs and every other tab is still working fine. Closing the tab means killing a process with all the memory allocated for the process.
Apart from that new approach Google claims to develop a faster browser in terms of startup times, page loading and so on.
A beta should be available today. A comic that shows the Chrome technology is available here.