Make a new thread, don't revive and old one.
This doesn't seem like best practice. In every automotive forum I've been a part of, people who had the same problem were strongly discouraged from making new threads for every issue. Instead, we search and add on to existing threads so that the knowledge about a certain problem is isolated in one place, and everything is searchable and easier to find. The RX8 forums will go as far as to delete a new thread and tell the poster to use the search function for a duplicate problem. Having used such fora, I've come to the conclusion that this is best practice.
Can any moderators chime in on how it's done here? As you can tell, I'm new. I have no aversion to thread necromancy; this is why we keep the old threads around in the first place.
Back on topic, I have plugs, wires, cap, rotor, upstream O2, valve cover gasket set (including tower and plug hole rings), air filter, fuel filter all on the way. We'll see what develops this weekend. No particular reason on the fuel filter. It was cheap, and I was paying for shipping anyway.
Lots and lots of threads exist where people's misfire issues evaporate after replacing ignition components. Example: http://www.d-series.org/forums/engine-management/170473-d15b7-misfire.html
O2s thread: http://crxcommunity.com/viewtopic.php?f=3&t=174673
Valve cover thread (also I have a leak, was going to do anyway): http://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/95-lx-w-d15b7-misfire-bogging-oil-spark-plug-wires-3188721/
If problem persists, will check EGR valve: http://www.clubintegra.com/board/showthread.php?t=61766
EDIT: forgot to note air filter. Shouldn't matter anyway.