If you've snapped photos at any of the Refresh DC meetups (or at the bar afterwards), there are a couple cool things you can do to make your photos findable. You can also get your photos on the Refresh DC site (if you're a Flickr member.
First, tags. Regardless of what photo-sharing site you use, tag your photos "refreshdc" and "refreshingcities." I'm only familiar with Flickr, but I imagine just about any photo-sharing site worth it's salt supports tagging.
Second, if you're on Flickr, join the Refresh DC group. Once you've joined, add your photos to the pool. This is how you'll get your super-fine photography on the front page of the Refresh site. Pretty rad.
Lastly, hop on over to Upcoming.org event page for that month's meeting and, under the Photos section, click the "Add more..." link. This'll give you a special "machine tag" to put on your Flickr photos. Copy that, and add it as a tag to all of your Flickr photos from that event. That way, they'll show up on the Upcoming.org event page for all to see.