This is one of my favourite subjects!
Right, there are a few companies/websites that make efforts in this area:
Swrve - a bit courier trendy but good ethical policy and the service from the UK people has been good. Ignore the hiding hoodie thing unless you do all your washes on 60, this thing positively clings to odour.
http://swrve.co.uk/ is the UK sales website
http://www.swrvecycling.com/ is the US website - greater range of products on here that the UK guys can order in for you; now the exchange rate isn't so great the UK store is cheaper than international shipping.
http://www.alwaysriding.co.uk/alwaysshop/ carry some swrve stuff and a range of other bits and bobs erring on the 'nicer' side of things.
If you are feeling particularly minted, try
http://www.rapha.cc/ very stylish but really aimed at London city types with more money than sense, or those who just can't bring themselves to look anything other than utterly suave on the bike!
Next there's Swobo, they do some great wool stuff but I can't vouch for any of it as it's all a bit rich for me. Another US company.
http://www.swobo.com/
If you really want to stand out, there's always...
http://www.dashingtweeds.co.uk/dt/?page_id=43
Whilst very much cycling kit, the wool jerseys here look awesome:
http://www.vintagevelos.com/clothing1.html
Edit: forgot to add a few companies that it's worth having a mooch through the range, the ones that make less obvious stuff and don't plaster logos all over their products quite so much (all IMHO of course):
Endura - good understated stuff, well regarded by most
Northwave - great technical stuff and nice designs although some stuff is hideous.
Pearl Izumi - really good balance of style and practicality, not always easy to find in the UK but Evans often have their stuff on sale.