Through Vallejo's site (http://www.acrylicosvallejo.com followed by selecting Model Color) you can also access another one at http://www.ttfxmedia.com/vallejo/cgi-bin/_modelis.asp?p1=ing&p2=modelcolortecnicas
Not specifically directed at military figures, nevertheless.
Also, Figure International magazine has regularly good articles, you might try their website: http://www.figureinternational.com/ENGLISH/indexen.htm
Some figure kit manufacturers have tips and tricks on their sites as well, you might check there too.
Lastly, do you know the book "How to Paint Realistic Military Figures"? From FineScale Modeler Magazine itself. Good value for money, I'd say.
Cheers,
Jan Martin Wagenaar