I will do some custom games against bots on PBE starting in about an hour or two which you guys can test the spectating on. My username on PBE is jesbro without the 123.

Jesbro, there are ppl on the server and games are on, so we can already test drop in spectator. The question for me is what do we test? Are the bugs that we saw a month or so ago supposed to be fixed or should we report them again?
Should we try all to spectate the same person, like get 10-20 persons to drop in just to see if the server will break?

I can tell ya one little thing. I started spectating a game of someone on my friend's list and it went to the matchup screen (with the 3 minute countdown). I decided to wait until later to watch, so I quit spectating.

The background music for Summoner's Rift Blind pick continued playing even though I had quit. Silly little quirk...