Ralph McQuarrie's lost concept art for a Star Trek movie - Star Trek: Planet of the Titans - the movie never happened, but McQuarrie did some design work for it. You can see how much different the USS Enterprise looks. Click the link to read more and view a gallery of more concept art!
18 Sci Fi / Fantasy Bars - I didn't realize just how many bars were out there in make believe worlds. As a maker of occasional lists, I know you can't cover everything, but I will point out one glaring omission: no Ten Forward. Still, it's a very fun read.
How to make a stempunk Mr. Potato Head - Because, well why not? Even if you don't want to make a punky Potato Head, you should read the tutorial for some ideas on painting techniques. You never know when it might come in handy.
Geeky snow sculptures - I like when geeks play in the snow. Check out lots of creations from Jabba to Space Invaders.
The Guild Hall - Read propmaker Greg Aronowitz's blog about the making of the Guild Hall for season 3 of The Guild.
Luke's Return of the Jedi Lightsaber - You see the lightsaber in that amazing photo? Someone made that. I'm not kidding. Click the link to see a primarily photo how-to of the build. I'm crazy impressed.
11 Heroes Nerd Girls Want to Date and Why They Shouldn't - Funny and stocked with pictures of pretty boys.
Make your own Rorscach mask - very cool how-to on making your own moving (and creepy) Rorschach mask.
The Secret Life of Toys - This Etsy seller photographs action figures in a variety of situations for your enjoyment. Superheroes, Star Wars, cartoon characters - if it's an action figure, it's fair game. The images are guaranteed to make you smile. High quality prints are available!
13 Sidekicks Who Are Cooler Than Their Heroes - Sometimes sidekicks are more likeable and helpful than their hero counterparts. They don't always get the recognition they deserve, but this article is a nice tribute.