OK, this is more about Tweeting than blogging, but tweeting my blog posts is what's important to me about Twitter. That and searching. Which brings me to #hashtags. Where can I get a free list of #hashtags or how can I extract them from Twitter? Even better would be hashtag and frequency of use, but that's secondary. I'd like to start by just getting a list so that I know the right keywords to saarch for related to my interests. Thanks!