There was a hardcore revival back in the mid/late 00's with bands like Gallows, Ghost of a Thousand & TRC from the UK; Terror, Cancer Bats & Code Orange, from North America ect.
It's incredibly hard for underground bands to make a living these days though, with all the free downloading, so I couldn't really tell you what's popular. Most bands have second jobs now, they last a few years and that's it.
I did this a few years ago as my swan song to the genre...
http://www.musicbanter.com/punk/6613...countdown.html