WashingtonParent.com. This site is a great local resource. Everything you need locally from planning your children's birthday parties to finding the right camps, it's all here! The magazine is also great, but the website is a real time-saver.
 

SheKnows.com. I just like the name of this site! Good articles about mom-related topics. There are also links to other mom-friendly sites.
 

Geoparent.com. A great local site to look at once in awhile to find out what is in town for the weekend or to get ideas in general.
 

AimingAtMoms.com. Good articles on mom's fitness and child-related topics.
 

Our-Kids.com. One of the first local sites out there and features a weekly e-newsletter highlighting local events. I recommend checking out this one periodically.