Here's my provisional list for WSB at the minute - some of this is just this year's lineup cut-and-pasted in for now:

Xerox Ducati: Haga & Fabrizio
Sterilgarda Ducati: Alessandro Polita & Shakey Byrne
RG Ducati: Ben Bostrom(!)/Luca Scassa/Lorenzo Lanzi?
Guandalini/Boulder Ducati: J. Smrz & Jake Zemke
Ten Kate Honda: Kiyonari, C. Checa & Jonathan Rea
PBM (Vent-Axia) Kawasaki - Tamada & Broc Parkes
DFX Honda: Regis Laconi? & Lorenzo Lanzi?/Muggeridge?
Althea Honda: Tommy Hill & ?
Pro Race Honda: Lavilla
Stiggy Honda: Leon Haslam & Roby Rolfo
Yamaha Italia: Tom Sykes & Ben Spies
YZF Yamaha: Katsayuki Nagasuga (Japanese SBK champ; replaces Nakatomi)
GMT94 Yamaha: D. Checa & Gimbert?
Grillini Yamaha: Zaiser?
Alstare Suzuki: Neukirchner, Kagayama & Fonsi Nieto/Xavier Simeon?
PSG1 Ducati?: Badovini? & ?
Pedercini Kawasaki/Ducati?: Iannuzzo? & ?
Aprilia: Biaggi & Nakano
BMW: Xaus & Corser

If everyone listed above appears, plus the question marks get filled in, that could be about 38 regular riders!

Getting a point or two is already looking like a decent achievement!