Right now, Charlie Stross Wireless, a short story collection. However, what I'm going to read very shortly will be Moby-Dick for the third time; my daughter just read it in her high school English class and it became clear to me that it's time to read it again. Good Lord, that man could turn a phrase.
I checked it out years ago (for some small value of "years", I guess), and again earlier this year. I think it's aged well, although Charlie himself seems to have his doubts.
I just finished Wireless last night! Charles Stross is pretty enjoyable. I loved his novel Accelerando. (It’s focused around the singularity and some pretty interesting ideas…)