I’d like to make the modest (I think) feature request to be able to view multiple tags.
I think the way reddit handles this with subreddits would work well: reddit.com/r/games+gaming combines the games and gaming subreddits. This should extend pretty reasonably to lobste.rs tags (ex: lobste.rs/t/compilers+compsci). Just to be clear, I think this should display the union of the two (or more) tags.
Why don’t you filter out every tag instead of the ones you want to see, temporarily? I do not think it is often the case that people want to see a particular combination of tags… but just for that day.
Consider the compilers and compsci example. If there’s just a few tags I want to look at, filtering out all the rest (and then unfiltering when I’m done) is rather cumbersome.
If you’re using mutt and mailing list mode, you can press
land type:http://i.imgur.com/Pe3scc2.png