Doing any changes in LW software (based on Reddit software) is very hard. The software has a nice functionality, but it is a maintenance nightmare.
But we could just create a new subreddit on Reddit, and link it from here. (My preference is that it should not contain "lesswrong" or "rational" in the title. Just in case it goes very wrong.)
I understand. That's bound to happen anytime people request major features; coming up with cool new ideas is one thing, implementing them is quite another.
However, it's among the most popular feature requests I've noticed so far. Having themed subreddits would improve functionality for many users, and I'm not even talking about the specific suggestion in cleonid's comment. How many hours/days of coding or testing are we talking about?
(BTW, new account?)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.