The Nintendo Community Fangame Convention is an annual online event for fan-game developers to demonstrate projects currently in development. This year, Mega Man aficionados will have the opportunity to play three titles: Mega Man Battle Network: Chrono X, Mega Man Perfect Harmony, and Mega Man: Day in the Limelight 3 (beta version).
To participate, simply click the links above and give the games a spin. If you want more to do, head to the NCFC forums and send the developers some. Comments and general suggestions are more than encouraged.
Best of luck to team Mega Man. Enjoy, folks! (thanks for the tip, Raul!)