I've also enjoyed all of Willam Gibsons books, including the latest trilogy "Pattern Recognition", "Spook Country" and "Zero History".
If you bothered to read through "Cryptonomicon" you'll either love "the Code Book" by Simon Singh more than I did, or hate it :-)
Assuming you've picket through the classics shelf, you might have missed out on Samuel Delany - "The Einstein Intersection" might be a good one to try on for size -- although I actually found "Neveryóna" to be maybe his most interesting book (of the ones I've been able to get hold of) [edit: After "Dhalgren", that is. But I think "Dhalgren" is a bit like Joyce's "Ulysses" -- a classic I haven't gotten around to yet. I spent the better part of ten (10!) years reading through "Dhalgren", picking it up on odd holidays - never loosing touch with the intricate unreality within, readily satisfied after reading a few pages or a chapter -- like nibbling on a choice ham that didn't spoil. It's rather more complex than any of the other books I've listed here].
Also worth mentioning in the "might be overlooked" section is Jerry Pournelle's "Falkenberg's Legion" (republished as "the Prince").
I'm afraid I've been mostly digging through second hand books lately, so the only other semi-recent book I could recommend would be "Broken Angels" by Richard Morgan (technically it's number two in a trilogy -- but I find it stands better on its own).
Of course, I also recommend Gibson's books. And "Ender's Game"/"Ender's Shadow", even though they're not cyberpunk/cyber thrillers.
http://ask.slashdot.org/story/12/08/08/2135246/ask-slashdot-...
I can heartily recommend most of the stuff in the 4+ comments: Ursula Le Guin, Lem, Strugatsky, Kurt Vonnegut... and of course Alfred Bester, especially "The Stars my Destination", proto cyberpunk.
http://www.simonmorden.com/books/equations-of-life/ includes an excerpt from the first book.
Then I bought all three volumes of the Baroque Cycle, but gave up halfway through volume 1 and sold them. It was just too much.