Ok, update on the Cams.com capabilities:
Every girl who shows up in an iframe is currently online.
You cannot currently sort an iframe by category.
You can sort our who's on now grid by category and any cobrand.
Linking straight to categories:
http://cams.com/go/g746274-pct&action=list&genre_key=XX
where "XX" can be any number from 1-12 in the list as follows:
01 - Girls Alone
02 - Girl/Girl( Lesbian)
03 - Girl/Guy(Couples)
04 - Threesomes/Groups
05 - Mature(Over 40)
06 - Transgender(TS/TV)
07 - Interracial
08 - Fetish
09 - BBW(Voluptuous Women)
10 - Guy Alone(Straight)
11 - Guy Alone (Gay)
12 - Guy/Guy (Gay)
and where "g746274-pct" is your refcode and linking method as described on your Overview page in the webmasters affiliate area.
Tip: You can use your own cobrand instead of cams.com in the code.