Microsoft has sent out invitations in Brazil for an event on January 29 and the tagline is a "release that will surprise you." While we do not have any more official information, it would seem all but certain that Microsoft is going to be showing off the Surface Pro and make the device available for purchase.
Microsoft has previously stated that the Surface Pro, which will run on Windows 8 Pro, will be priced starting at $899 when it comes out in January. That will be for the 64 GB version, while the 128 GB Surface Pro unit will be priced at $999. The prices do not include the Touch or Type covers.
There is no other information known at this point and we should point out that Brazil currently does not have any WP8 devices on sale as of yet, so those devices could also make an appearance on that date too.
We should note that the dates line up to a previous rumor that the Surface Pro would arrive on January 29th.
Thanks for the tip Leoberto!