Three new rips for today:

Dead or Alive 2 (Naomi)(1999)(Tecmo)
Sega Marine Fishing (Naomi)(1999)(Sega)
Virtua Fighter 4 (Naomi 2)(2001)(Sega)

I've also mirrored RB's Toy Fighter rip.

Haven't checked any of those with AOSDK (been using Deunan's player for testing, since the plugins aren't updated yet).

Incidently, RB, if you want to add streamed Naomi sets to M1 (like the MP3 Model 3 ones), here's the relevant info.

ADX (lotsa rippers for this one, so you should be able to find the file offsets/player easily):

Melty Blood - Act Cadenza (take note, one ADX file is muxed into SFD stream)
Musapey no Choco Marker
Senko no Ronde

AM2 SPSD stream container:

Capcom Vs. SNK - Millennium Fight 2000 Pro
Capcom Vs. SNK 2 - Millionaire Fighting 2001
Guilty Gear XX #Reload (has one additional music more than normal XX)
Mobile Suit Gundam - Federation Vs. Zeon DX (didn't try the normal version, but I imagine it doesn't have more music than this one).

How to rip/play SPSD files:

SPSD magic at offset 0x00, 0x40 bytes of header, then Yamaha ADPCM data (all files I've seen have 2 channels with 0x2000 interleave).
Offset 0x0c in header stores # of samples in the file (DWORD, LE). Add header size to that and you have full SPSD filesize.
Offset 0x2a in header stores stream frequency (WORD, LE).

SPSD files are playable by a fairly recent VGMStream compile (say, from yesterday).