On my Star Trek agenda:
Greater than the Sum
The Buried Age
The Terok Nor trilogy
Destiny trilogy
To Reign in Hell
DS9 Millenium trilogy
Klingon Empire
The last three "A Time to" books
Articles of the Federation
The first four Titan books
The rest of the first two DS9 relaunch omnibus editions
Update:
In the last ten days, I've read the following:
Greater than the Sum
The Buried Age
The DS9 Millenium trilogy
A Time to Kill
Here's how I would rank them:
1) The Buried Age 4/4
2) DS9 Millenium trilogy 4/4
^Both are now in my 'all-time favorites/top ten' trek pile, so it was a tough call putting one above the other. I may reverse the order upon later re-readings, but both deserve high praise.
3) Greater than the Sum 3/4
^This book really helped make up for Before Dishonor. It almost tempted me enough to start the Destiny trilogy, but I plan on delaying those books until after I catch up with a few earlier trek novels (the last two 'A Time To...' books, "Articles of the Federation," and at least a couple of the Titan novels (if not all four).
4) A Time to Kill 3/4
^lots of fun political intrigue touched off with some nice Riker/Troi and Worf/Martok moments (definitely helping me look forward to what Mack can do with the Destiny trilogy)
I'm adding to my Trek agenda Q&A, the latest Mirror Universe omnibus, and The Lost Tales: Serpents Among the Ruins. Star Trek Excelsior: Forged in Fire is on my 'maybe' list, but it's not yet on the agenda.