Regex has updated his FrNes site with the following news:

Fixed 90% of the bugs with Sprite #0 now (fixed mot of the previously broken games). Crystalis, SMB3, Megaman 3-6, Kirby, Ninja Gaiden 3 and lots of others that weren’t running well are now running perfectly or near perfectly. A mapper 7 game is running as well (NARC), but I haven’t had much luck with Battletoads, Captain Skyhawk or Solar Jetman. Haven’t had much luck with Punchout either, but it’s implemented as well. Looks like I’ll be spending some time trying to trace the bugs etc. Everything seems to be coming together… maybe I’ll have a shot at adding MMC5 (Castlevania 3 among other games). We’ll see what I feel like doing.