If you want a good general immersion in Agile practices look no further than DevTeach (www.devteach.com)
Last DevTeach (in Vancouver) I sat through a number of Agile sessions with a fellow development partner. This parter had virtually no experience with Agile practices. After DevTeach we began discussions on implementing Agile practices in his 15+ developer shop. It was good for him to hear from other developers about their experiences with Agile.
So if you want to get your management, developers or development buddies on board with Agile then send them Toronto in May for DevTeach.
PS: You can also stay for a post-con session on Building Business Apps with Silverlight 2.0 given by me and my business partner Jim Duffy
PSS: Small conferences like DevTeach are MUCH better than large ones. Why: Because the speaker to attendee ratio is much lower and we can all interact much moreā¦. I personally prefer small conferences over large ones.