I guess I never noticed it, but I have a lot of menu icons! In order from left to right is:
Adium
Waveboard
Tweetie
BetterTouchTool
Alfred
Dropbox
Google Notifier – Calendar
Google Notifier – GMail
Caffeine
MobileMe Sync
Time Machine
Bluetooth
Wireless
Audio/Volume
Time
Spotlight
Check out a screenshot of all of them on my desktop: