Yahoo! has a slick new DHTML interface for its Mail Plus web-based email. It's modeled on Outlook (folders on the left, preview pane on the right) and allows for drag and drop of messages. Plus, users can have multiple messages open at once via a tabbed structure, and messages come in upon arrival...no more need to check mail by refreshing the browser window. They've also added an RSS feed feature to aggregate all of your favorite feeds into one place, and a fun automatic subject line generator (my first hit returned "Re: four and twenty blackbirds"). All of which makes for a faster, more enjoyable experience.