I love this site and the people that I've met on it. One of the things that I found difficult was finding an "active" and/or recommended host in some of the larger cities. For example, DC has about 120 hosts. Of those, I imagine about half are inactive, or have no recommendations. It'd be great to filter those out, or at least put them at the bottom of the search results, so that I don't waste my time with messages to people who aren't around.
I know that you can see this when you click on the host's profile, but it would save a lot of time if these were automatically filtered out. Couch Surfing has this feature on their search, if you want an example of what I mean. Also, it'd be great to include filters on for number of guests, nights, etc.
I'm happy to help make this happen if there's anything that you'd like me to do!