My ping without retries:

Code:
frank@cutie:~$ ping ubuntuforums.org
PING ubuntuforums.org (91.189.94.12) 56(84) bytes of data.
64 bytes from feijoa.canonical.com (91.189.94.12): icmp_req=1 ttl=43 time=147 ms
64 bytes from feijoa.canonical.com (91.189.94.12): icmp_req=2 ttl=43 time=147 ms
64 bytes from feijoa.canonical.com (91.189.94.12): icmp_req=3 ttl=43 time=147 ms
64 bytes from feijoa.canonical.com (91.189.94.12): icmp_req=4 ttl=43 time=148 ms
Can't say what your issue is, but Forums works as usual for me.