New hard SF recommendations?

My dad the curmudgeon is always on the lookout for science fiction to read. He tends to prefer hard scifi because he has difficulty trying to suspend his disbelief, but well written scifi of any kind can work for him.

I know he loved the alien invasion WWII series by Harry Turtledove. He's currently rereading Green Mars. He liked William Gibson, most of Peter Hamilton, Richard Morgan (although he found it a little bloody), and he mostly likes Iain Banks (except he feels that there's too much Deus ex Machina in the recent books). He liked Cryptonomicon, but not the books that followed afterwards.

Edited to add:
If it's classic, he's probably read it. He's been reading SF longer than most of us have been alive -- he celebrates his 71st on the 30th and started reading scifi when he was about 12, back when HG Wells and Jules Verne were about all there was.

So, he's more looking for recent/new authors he may not know about.

Feedster

So Feedster is dead.

Is there anything like it left?

I'm specifically looking for technologies that lead to treating individual blog posts or articles as the unit, rather than the publication, or publication section. So, a service that sends you stories from all over that suit what it believes your interests are (or based on what you tell it your interests are, alternatively).

Does this exist?