Bitcoin Forum

Apart from this one, of course.

https://en.bitcoin.it/wiki/Trade (Almost every service which deals with Bitcoin is listed here)
http://bitcoin.clarkmoody.com/ (Check the price of BTC with an updated "last" price in the website header, so no need to open a tab when using a multi-tab browser like Chrome or Firefox -- now reconnects if disconnected!)
https://glbse.com (Buy/sell BTC-denominated stocks)
https://bitcoinica.com/ (The bane of Bitcoin. Leverage yourself 10:1 and take a gamble on your projection of the Bitcoin price!)

Oh, and that. (lots of Bitcoin discussion & news)

ETA: http://bittalk.tv/?page_id=314 (Bitcoin Magazine -- get the BTC goings-on in a well-organized manner on physical media!)
ETA2: http://<i>Linking to illegal sites is forbidden. If you bypass this censorship, you will be banned.</i>.onion/ ETA3: uh... guess you can skip that one :P
ETA4: http://blockchain.info/ (Having issues with a transaction? Check out what happened here), http://bitcoincharts.com/ (charts with plenty of options for how to view the data -- also shows arbitrage opportunities between exchanges)

(8 sites, now, 9 depending on your criteria for what counts)
All else is irrelevant.

http://reddit.com/r/bitcoin

http://mtgoxlive.com or it's newer copy-cat equivalent which i don't remember the url for.

also:
http://bitcoincharts.com
http://blockchain.info and http://blockexplorer.com

I like to hang out around bitcoin-otc.com (http://bitcoin-otc.com)'s irc channel. Especially recommended if you like some personal negotiation in your trade.  ;)

kludge i think thats one of my favs too, but is it illegal, everything you can get there you can get in the dam. Maybe S R is the new amsterdam of the airwaves.

Looking forward to the first issue of bitcion magazine

checking out the links thanks chaps, how about reasons why they are in the top ten

its missing a gbp ticker value, london is the worlds financial trade route, no offence new york

http://feedzebirds.com/
http://bitcoincharts.com/markets/
http://dailybitcoins.org/
https://freebitcoins.appspot.com/
http://www.freedigitalmoney.com/en/Bitcoins/
http://www.iwantfreebitcoins.com/4102
http://bitcoin-kamikaze.com/?father=47762
http://www.dragons.tl/

Just about all the useful/legit that I have come across.

Yeah, probably it's beyond Englishmen to conduct trade over irc channel. :D

Some others:

http://bitcoin.stackexchange.com/ (http://bitcoin.stackexchange.com/)
http://stuffexists.com/bitcoin/ (http://stuffexists.com/bitcoin/)
http://www.thebitcoinreview.com/index.php (http://www.thebitcoinreview.com/index.php)
http://bitcoinwatch.com/ (http://bitcoinwatch.com/)
http://bitcoinx.com/charts/ (http://bitcoinx.com/charts/)
http://bitcoinmedia.com/ (http://bitcoinmedia.com/)
http://www.thebitcointrader.com/ (http://www.thebitcointrader.com/)
http://www.bitcoinmoney.com/ (http://www.bitcoinmoney.com/)
http://www.bitcoinminer.com/ (http://www.bitcoinminer.com/)
http://themonetaryfuture.blogspot.com/ (http://themonetaryfuture.blogspot.com/)
 
 

Good Question