I have resisted creating a blog for two reasons: 1) there are never enough hours in the day, and 2) the areas that I know well enough to say something interesting about -- SQL Server performance and some other engine issues, mainly -- are esoteric, not exactly People magazine-type fare that would entertain the masses.
Recently, though, I stumbled across the SQL Query Optimizer team's blog (http://blogs.msdn.com/queryoptteam) and Ian Jose's blog (http://blogs.msdn.com/ianjo/). These are both good reads and really informative. These blogs are primarily about the SQL QO, and both manage to get very useful information out there that might otherwise remain locked up in Microsoft. I think the typical database developer or DBA would benefit from reading them, and that made me feel better about my second concern.
Which left my concern about not having enough time to do something new. But then I heard that Ken Henderson has somehow found the time to hold down a full-time development job, write best-selling books, and still maintain three different blogs. I was forced to abandon my theory that the gods have conspired to make our days too short, and concluded that maybe my first concern really boils down to crappy time management.
I guess we'll see how it goes.