A few weeks ago, I commented on a BB story about Lost. Alias suffered from the same disease. This week, Wil Wheaton brings them up, commenting on the fact that, as I noted, Heroes is not yet suffering the same disease.
Note to producers/writers, and this one is free: Story arcs have to end. I don't know if Wil watched Alias, but it drove me nuts with this. Smallville drives me nuts. But Heroes is different.