From my vantage point at 3rd & Ward:
464.7000 (110.9) was pretty active. I didn't arrive until after 23:30, so didn't catch a whole lot. Active units included Base, "Docks", and Gates 1 through (at least) 7. Also heard "Police Remote", and a Monorail unit. Docks was very active. Also a lot of people referred to by their first names. Base seemed to have a camera pointed at the steps of EMP because he wanted the people he saw on them off of them at 23:45. A decent amount of comms about Broad ST, and Thomas ST too. After 00:15 Base reminded gate people to pull signage, and that they should bring them back to the production office. There was also a production trailer somewhere. A lot of people on this channel were contractors. I believe it was called Channel 1. They also had a 4 and a 16 (notes below). The radios they had used selector knobs, because one guy told another to turn the dial all the way to the end. This channel was not being used by Pyro Spectaculars, because sometime around 23:40 Base announced that they were going to be "handing the timing over to Pyro." I'm not exactly sure where the gates were; but it sounded like most, if not all, were blocking cars, and not people. Gate people were to also watch for falling burning debris during the show.
Also on 464.7 is Cuddy Taxi units serving Southeast Auburn and they DO NOT SHUT UP. I had two scanners and a two way, and the two way was the only one that would pick up the guys in Seattle Center decently, but it's not field programmable so I had to leave it on the equivalent of "decode any PL" mode. Horrible intermod.
464.65 (2XX.X) was Channel 16, I'm pretty sure. Some 17 year old girl got wasted and the EMS ops were here. The actual EMTs/EMTPs weren't heard here (I believe it was Seattle Medic One that responded, but this frequency also has a data burst every minute or so, so they got walked over). It was just the security type guys that were yakking here. I forgot to write down the PL, but it was 200 something. May have been 218.1.
I bet there was more, but other than those 6 feqs I only scanned some common "business band" frequencies and the freqs from
WPYH468 (Seattle Center, IG). No relevant hits out of any of those. I forgot to scan the trunked channels.