Thank you for the link, Brian.
LosCon is a writers and artists convention that meets in the Los Angeles area every year over Thanksgiving weekend. I haven't been in a couple of years, but I attened the three years in a row before that. It is presented by the Los Angeles Science Fantasy Society, which I believe is the oldest active sf/fantasy organization in the U.S. Because it is based in L.A., where a lot of writers live, there is usually a good attendance by writers you would know, some of whom are actually members of the Society. The panels presented are usually very interesting, the biggest problem being deciding which panels to attend when two or more that you want to go to are being offered at the same time. Besides panels, there are gaming rooms, an anime room that runs 24 hours a day, planned social events in the evening, room parties, especially on Saturday night, a great dealers' room, a con suite with snacks and sodas available most times of the day and night, authors' signings, a filking suite, and usually much more. Oh, yes, there's also an art show, usually a blood drive, the last time or two there was a Locks of Love donation point. Lots and lots going on.
Panels are varied and diverse. Many, of course, are on science fiction and fantasy topics. But, being in L.A., there is a pretty big contingent attending from places like JPL (Jet Propulsion Lab in Pasadena), Cal Tech, and the other universities, so there are usually some very interesting science panels as well. There's also usually a couple of costuming panels, and almost every year on of the Society members puts on a couple of panels showing cartoons (traditional as opposed to anime). One year he did Loony Tunes; another year he did a Saturday Morning Rocky and Bullwinkle showing. That was perfect.
I could go on and on, but I won't. It's a good time, intellectually stimulating and just a lot of fun.