I've been spending anywhere from 5 to 15 hours a day hiking around my study site in Windsor, and while I have had some good birds to show for it (http://joshvandermeulen.blogspot.com/2011/05/some-highlights-from-windsor.html) I haven't found anything super rare. 2 weeks ago, Murray Shields found a Western Tanager in Ojibway. I was there the same day shortly after with Laura, but we decided to hike a different trail. Word got out about the tanager later that afternoon, but Tom Preney and I couldn't make it appear.
A few hours ago, Karen Morgan posted a Yellow-crowned Night Heron from Malden Park, which is literally 200 meters from my study site. Gah! So guess where I will be before work tomorrow morning!