You can coordinate attacks, trade with other members, and chat in general.

Using the chatroom:
You may click "Join the Chat" for full screen, then "Log in"
You may also directly click "Log in"

Top 10 Players with most points earned for the past month:

hotsauce 310,716
Dark Light 196,196
DreamKnightz 176,211
Youri 172,931
Mrvan 159,172
IdentityMatrix 155,058
Hakri 142,699
Dragonheart 141,988
Dol 132,318
Macintosh 121,703