Most people chit chat with their linkshell mates via the linkshell dialogue. So you won't see many people just using /say to communicate. If you want to interact with more people, I'd strongly suggest joining a linkshell.

If you're looking for a linkshell to join, I'd suggest going to the Forum for your server and posting in there.

Also, most people on all servers have migrated to Uldah. If you want to be around more people, head to Uldah. (Jump on the ferry and then follow the path East until it forks South.)