As I haven't signed up to the social network so i cant give a review of your site, but I have noticed that anyone accessing http://mypebook.x10.mx/ can see the folder structure of the server, this is bad practice.
currently the free server, starka is running:
Apache version
2.2.22
PHP version
5.3.10
MySQL version
5.1.62-cll
Perl version
5.8.8
Kernel version
2.6.32-042stab056.5
cPanel Pro
1.0 (RC1)