Facebook founder and CEO Mark Zuckerberg's visit to Vancouver last week has the tech world speculating about what he was up to.

Zuckerberg's Facebook location status recorded that he was "near Vancouver" on Oct. 5, then on Monday a Twitter user snapped a photo of him at a hot dog stand on downtown Burrard Street.

The first sally of scuttlebutt suggested he was there to possibly acquire HootSuite, a Vancouver-based company that makes a program for posting content to Twitter, Facebook, MySpace and other sites.

That rumour was doused when HootSuite CEO Ryan Holmes tweeted that "facebook isn't buying hootsuite anytime soon."

Others suggested he was in town to sign up a video game company to develop a Facebook game store, or to meet with the online game company Tiny Speck, which makes the multi-player, web-based fantasy game Glitch.

Zuckerberg was also spotted at the University of British Columbia, leading to speculation his company, which employs a lot of UBC grads, might be looking to open a Vancouver office.

But with an estimated net worth of $17.8 billion, he may also have been town to buy property for himself.