I just found out about this today, and the registration is limited, so sign up quickly.  BTW, I am not involved with this event in anyway, so if registration fills up, there is anything that I can do about it.

Here's the details:

Cleveland Day of .NET is a free one day conference targeted at developers using the Microsoft .NET platform. It is a collaborative effort among the various local user groups and is open to all developers, local or otherwise. This event is occurring on Saturday, May 17, 2008 from 8:00 AM to 5:30 PM. Cleveland has a lot of passionate, knowledgeable developers that have been asking for the opportunity to get together and share their knowledge with each other. Now we all have that chance!

Here's the link: http://www.clevelanddodn.org/

~ Robert Shelton