More Yahoo! Mail Beta Thoughts

Following up on my previous post about Yahoo! Mail Beta I noticed that the new beta interface has no space available thermometer bar, like the normal Yahoo! Mail does:

Yahoo Mail

This is either an artifact of the beta not having all of the features of the old Yahoo! Mail yet, or that Yahoo! has something special planned regarding Mail. I'm willing to bet that unlimited mail is impractical and would be abused, but we'll see!