I’m working on a few things, for these and others, but I figured I’d mention them, since readers might have something that fits:

• Jetse de Vries’ Shine Anthology submissions period is crawling closer. He’s looking for Optimistic SF set in the near future — see the Shine Anthology Blog for more information about what “Optimistic” means, and the anthology guidelines here. He’s also taking twitterfic submissions for the Outshine feed.
• Ahmed A. Khan is looking for fiction for two anthologies, one titled “Cheer Up, Universe” (feel-good SF), and the other a YA (pre-teen) anthology titled “Fun Times in Andromeda”. More details on both at Mr. Khan’s Livejournal.

I’m sure there are other interesting calls for submissions floating out there, but I have a few invitations that have filled my plate, so I’m not up to speed. If you know of something interesting, feel free to link to it in the comments, and I’ll add it to this post.