Registered users can read private messages from anyone and everyone.

All users can read Insider-exclusive boards but only Insiders can post there.

All users can use emoticons and mark-up code in their posts.

Every registered user has access to icons (80x80 pixels).

We have reduced posting time limit to 15 seconds between each post to speed things up.

Private messages are open to everyone after 20 posts, but Insiders can use private messages immediately.

Updated Quick Post feature with bug fixes, a new sliding interface, and new look for quick comments.
New Insider Only Features

Insiders can have colored user names. This applies to the text but not the border.

Insiders can now upload our new biggie-sized "MegIcons" (120x120 pixels)

Insiders can upload a small signature picture which will appear at the bottom of their posts.

Insiders, VIPs and above can give themselves catchy titles under their username.
General Upgrades

The oft-requested Icon submission tool that allows users to bypass our old approval system.

We've removed the "your message has been posted" page between messages to make posting faster.
There are a few things to note about the new changes. The larger MegIcons will only be available to the user who upload the icon themselves; they are not stored in a shared pool like the old icons.

You can find a feedback thread in the forum. Check back for more info soon and, in the meantime, here are a few images illustrating the new MegIcons.