Bill Gates at the event in Seattle last night. (Thanks to Hanson Hosein for this photo.)

I got a chance to talk with Bill Gates for just a few moments last night at an event previewing the new Visitor Center at the Bill & Melinda Gates Foundation headquarters across from Seattle Center.

The upshot: He’s excited about the new facility because it will make it easier for people to get a sense for the foundation’s work, and maybe inspire them to get involved. And Melinda played a bigger role than he did in planning the technology behind the various exhibits.

Not exactly the most astonishing revelations, but here’s your chance to do better, on weightier subjects. Gates will be online this afternoon, starting at 2:15 p.m. Pacific, for a conversation about his 2012 annual letter — covering topics including poverty and global development — in a live video stream on Facebook and UStream.

Viewers won’t be able to join him in the video, as they did with President Obama’s Google Hangout, but Gates will be there live, answering written questions submitted online.

Here’s the video stream below. The conversation will use the hash tag #askbillg on Twitter.

The Gates Foundation Visitor Center opens to the public on Saturday.

Watch live streaming video from billgates at livestream.com
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