Its too early to say anything. Sites lose indexed pages sometimes for weeks then come back strongly with more pages indexed! Wait and watch for another week or so.
Unless you're doing something you shouldn't be, it's more or less out of your control.
The same thing happens to me quite frequently, actually. It first started happening to me in January, 2007. Sometimes, only the main index page will show up and then most of the time, Google is able to show every page indexed by its crawlers. I would follow vickysoft's advice!
am also having the same problem i am having a mobile related website. It is a small website but the index page in google suddenly gone off in google can anyone give a suggestion for this i am totally messed up so kindly help me.......