Earlier today Opera Watch posted a reminder of the pending Opera Mini 4 Beta release that’s coming tomorrow. What’s so big about this release? Well, only a handful of people actually know, but the Opera Mini team has posted some clues as to what the big new feature is.

The next major upgrade to Opera Mini, code-named “Dimension,” is on the verge to being released to testers. Daniel from Opera Watch says that you have to be invited to be part of the Beta program and that you can be put on the list by providing your name and email address here.