Originally sent December 29, 2025.
COSine 2026 will be January 23-25, 2026 at the Embassy Suites by Hilton Colorado Springs.
A Happy Merry to you all!
COSine is now only a few weeks away! The schedule is done (you can see it here, and also the list of participants), and we have fired up the fusion reactor to get ready to start printing the program books—and to top off the charges on the staff and volunteers (once we find the right cables).
If you want to get the best rates before they go up, now would be a great time to preregister. Aside from saving money, it also guarantees that you get a spiffy laminated badge with your name preprinted on it!
Spam Spam Spam Spam Spam
Before moving on, I did want to address something. Many of you have contacted us to let us know about messages offering to sell you the COSine mailing list. Just to be clear, we do not, have not, will not ever sell our mailing list or your contact info!
The messages are definitely spam, and while we are sure that the senders—Tabitha/Wendy/Priah/Layla/Kelly/et al—are lovely people, we suspect that responding to these messages would not end well. They’ve tried to sell us our own list multiple times as well, which is at least a bit tempting, since their version has a lot more names on it than ours!
Hotel
You can book a room at the Hilton site here. You can also call them at 719-599-9100. Be sure to mention COSine to get the con rate (and so the con gets credit for your room nights :-).
The deadline for getting the reduced rate has been extended to January 7th. However, the hotel is filling up fast. If you’d like a room (particularly if you’d like a double-queen room vs. a king room) you should probably book as soon as possible.
If you have any problems with booking a room, please let us know (just send a message to info@cosinecon.org) and we’ll help get it sorted.
Guests of Honor
One more quick rundown of our main guests:
- Cory Doctorow – Our Guest of Honor, the amazing writer, journalist and activist. He’s best known for his Little Brother series, and also for coining the term Ensh*ttification (and writing a book with that title. He’ll also be doing a panel about it at COSine). It explains why almost every interaction with technology these days has turned into a rage-inducing nightmare. Or is that just me?
- Dr. Josiah Seaman – Our Science Guest of Honor, a Geneticist and Bioinformatician who also knows a lot about a lot of different subjects. He and Courtney have a really cool hands-on science panel planned.
- Michael Carroll – Our artist guest of honor, Michael is best known as an award-winning space artist who literally has some of his art on Mars (in digital form) and is also an author and international teacher and lecturer.
- Connie Willis – Special guest and Sci-Fi Grand Master. Everyone always looks forward to her panels at COSine, but I definitely want to hear what she has to say on the other of our rudely-named panels this year!
- Courtney Willis – Special guest, the inimitable Dr. Science. As well as a big hands-on science demo with Josiah, he’s also bringing some 150+-year-old sewing machines from his (large) collection, and is going to do a make-and-take panel where you can try them out!
Contacting Us
Feel free to ping us if you have any questions or issues, prehistoric computing devices, Minas Tirith LEGO sets, house-trained llamas, or portable black holes.
Arlen, Eli, Karen, Morland
The COSine Con Com