If it is due to a site update, it would be nice if while updating the site you can put and easy single html page stating that the site is being updated.
Well I just checked with pingdom.com and leaserig.net is up. It is reachable from India also, (where Im at). Seems as though the DNS servers that Vodafone ( my ISP ) are using have lost Leaserig.net's name registration. Perhaps you recently updated your DNS information, and it hasn't propagated properly yet. In anycase I just added Leaserig.net's IP to my local hosts file and everything is fine again.
myshell$ host -v leaserig.net
Trying "leaserig.net"
Received 30 bytes from x.x.x.x#53 in 88 ms
Host leaserig.net not found: 3(NXDOMAIN)
Received 126 bytes from x.x.x.x#53 in 79 ms