EDIT: It is official!
We're happy to announce that with today’s batch of order emails, we have completed our reservation queue. We are now in-stock and Steam Deck is available for purchase!
I wanted to give everyone here a heads' up that it seems like Valve is through most of its preorders for the Steam Deck, so the delay between reserving one and receiving a confirmation is essentially negligible at this point (unlike the months-long waits of the past).
Anecdotally: my husband put in a reservation on Sunday and received confirmation on Monday, the next day (US 512GB model).
If you've been waiting out the wait time for a Steam Deck, it looks like your time has come! You should be able to get one almost ASAP moving forward.
Also, if you're on the fence about it, I cannot recommend it enough. I absolutely love mine.