Per Russell Shaw, ShoreTel has filed it's paperwork for an IPO. Reuters also has the story. Ken Camp also provides his opinion. I'm sure that more will be written in the time ahead. ShoreTel is one of the many newer entrants into the enterprise VoIP market and have been doing some interesting things (and yes, in the spirit of full disclosure, they do potentially compete in some areas with my employer, Mitel). Kudos to them for getting things together to go for the IPO. It will be interesting to see how that moves forward - best wishes to them all.
 Side note: It's interesting to me to see that the Reuters story about ShoreTel IPO filing in the US was actually filed by a reporter in Bangalore, India at 6:54am. At that time most North American reporters were probably only getting going.