Facebook — more specifically Mark Zuckerberg — has promised an “awesome” announcement will come out of Palo Alto, Calif., today. But what will it be? These are the three leading theories:

Skype integration: TechCrunch reported that its sources have said that today’s announcement is all about Skype integration into Facebook.

Facebook would stand to benefit from a partnership with Skype — not only because of the association with a brand synonymous with video calling, but also because Skype’s recent deal with Microsoft will let both companies thumb their noses at rival Google.

One of the main features of Google + is video conferencing, and it is, in my opinion, the coolest and most innovative aspect of the social network. Not only that, it’s just about the only major feature Google + has that Facebook doesn’t at this point.

Facebook would be wise to catch up.

Facebook’s iPad app: Facebook’s also been slow off the mark on developing an iPad-optimized app for its social network, but recent reports from The New York Times have indicated the app is near launch.

The HP TouchPad and BlackBerry PlayBook have tablet-optimized apps built by their respective companies, but users have been expecting an official Facebook iPad app since the iPad launched.

Facebook Music: Facebook is also expected to be launching a music feature for its network sometime in the near future that would let users see what their friends are listening to and get album or artist recommendations.

Last month, a report from Forbes indicated that the site had signed an agreement with Spotify after Zuckerberg said that the company’s next focus would be on music. Spotify signed a deal with Virgin Music in the UK this week, but there’s been no more word of the European service making headway on this side of the Atlantic.

What do you think — or hope — the announcement will be? Let us know in the comments.

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