Facebook's building something new, and we're liveblogging the announcement tomorrow!

Facebook had a banner year in 2012. It became a publicly-traded company, acquired Instagram, and continued to evolve its social network through added features and countless app updates. What're we gonna see from Mark Zuckerberg and pals in 2013? It's tough to tell, but at least part of Facebook's future will be revealed tomorrow when the company shows off something new it's been building. Might it be, at long last, the fabled Facebook phone? There's only one way to find out, so join us tomorrow ...