Thing is guys, searching blogs requires you to know what you're looking for. You might already be familiar with everything that gets uploaded here but me personally, I don't read any music reviews except the ones on collective-zine so anything recent on here that isn't DIY punk/hardcore/metal/indie will probably be news to me (and even most of that is new too). Not everyone who posts something really obvious to you will know that it's all over the internet, although I guess with a big name album leak you really ought to be able to work it out. But still, one person's staple is another's obscure gem. Although funnily enough, the music in this post (and most of my posts come to think of it) will meet all of your criteria perfectly, so everyone's happy.
Anyway, music time in the shape of Belle Epoque. In case you can't guess this is French screamo, and good stuff. If you dig on Anomie, Daitro, La Quiete, Amanda Woodward and the like then this is definitely worth getting. Particularly since apparently this demo goes for about €40 (insane, it only cost about a quid!) on ebay as it's the UK tour edition and was limited to 130, so unless you're a record collector you won't be getting a physical copy.
http://www.mediafire.com/?bcz02jyzldg
Belle Epoque - Demo (UK Tour Edition)
And now for some grindcore. 5 songs in 3 minutes, hyperspeed technical aggression from Leeds. Imagine Narcosis compressed, or As The Sun Sets. At the time of this recording the band featured ex/current members of Narcosis, Reth, The Afternoon Gentlemen, Red Stars parade, Stigma and a bunch of others I don't remember right now. Since they have to learn their sets as one long song (it's too fast to do as anything but muscle memory) you'll never get to hear these songs again live since they've moved on to new material, nor will they ever make an appearance on an album.
http://www.mediafire.com/?m55xvlvnydx
Executive Distraction Tasks - Demo