I wanted to easily see if my (hilariously small amount of) Bitcoins gained or lost value, but I just couldn't find a tool that did the job to my satisfaction.

Therefore I present the Bitcoin Utility Belt for Google Chrome (holy cow, it's a browser extension!):

https://chrome.google.com/webstore/detail/bitcoin-utility-belt/bejgfgaachlgfbdboheckmhpfodgfien



Utilities in the belt so far, from top to bottom:

• Currency Converter (also shows current BTC in USD value from MtGox)
  
• Profit/Loss display of Bitcoins you bought
• Graph showing the last 24 hours of BTC/USD value

I hope you'll find it as useful as I do. This is the first (public) release, so there will be bugs, I just know it. I'll watch the thread for any sightings of those pesky critters.