IRC Channels
There are various IRC channels in which you can meet Seaside people.
#seaside on irc.freenode.net
This channel is still quite new and not yet very active. It might still be worth visiting though.
#pharo-project and #squeak on irc.freenode.net
Despite its name you’re most likely to get help in this channel. You can ask general Seaside questions even if you don’t use Pharo. It is quite active and you’re likely to get help no matter the hour of day.