I have my reservation
And don't reserve with some guys calling you by phone.
Register with calling hotel or their website.
There's usually people that are looking to room share at devcon if you're trying to defray the cost a bit.
Of note, it will take you longer than you realize to traverse to the meeting space of the cosmo if you stay at another hotel. Vegas hotels are unique in that they pack a LOT between the street and their useful space. That said, at $169/night, the rate is reasonable compared both to past devcon hotels, and to the quality of the hotel in general.