gotcha writes:  

Info Box is a visually appealing site info block for your nuke website. It provides users easy access to their profile, private messages, etc and shows a login box (with security image if enabled) for anonymous users.

You can see it in action at www.nukecoder.com and you can see a screenshot HEREOther features include:
- Separate online user and guest lists
- Private Message Notification Drop-in effect
- User Registration Stats
- Newest Users List
- Valid HTML 4.01