I regularly promote speaking opportunities for women,and in Washington DC, one of the ongoing options is the ignite events at ignite-dc.com. Although I usually just promote and attend, those I know who grace the stage including some amazing ones;

The challenges with the social web and the aggregation of content is that there isn't a simple way to do it at this point. There are a lot of social media tools and various apps but they may not all be connected to you. Here is an example: