No need for me to wax expert on Twitter's new List feature as Mashable, TechCrunch and many others are doing that. (Here's a video showing how to create a List.) Frankly nobody is an expert yet. We're all curating (creating lists, culling them, joining others, etc.). Here's my round-up of Washington DC tweeps whose 140-character musings I find useful or entertaining.
I will point out that the number of lists featuring smart women in tech or social media is very cool. Examples here and here and here.
Darn. For some reason Expression Engine is not letting me post the widget. I get a "script error" message. I'll try again later. Or maybe the widget is overloaded on Twitter.