Opened Web sites are displayed as tabs. These can be parked at top, bottom, left and right of screen. Ideally, top or bottom is the best since the other two use valuable screen real estate. The tabs indicate if the page is loading, done or has an error. However, they don't appear on multiple lines, they just keep getting smaller.
Opera includes support for email, chat and newsgroups.
You can sign on for a free OperaMail account that uses a Web-based interface. Or POP your email directly into Opera. You can even add a signature to outgoing mail. Opera is also unable to effectively multitask. I tried sending a message while downloading email from Yahoo.