使用网站的子域登录用户

Fogbugz-on-demand, 37 signals, and PB-Wiki all use sub-domains with custom url's for each group of users to access their login page. So it doesn't even seem possible for a user using those services to login to a generc login (that any user of the service could log into.)Fogbugz-on-demand, 37 signals, and PB-Wiki all