I've only tried the stock browser and Firefox, and using both of those you have to go to the site, press the menu button and then check the 'request desktop site' option....which is a bit of a pain.
Do any of the browsers just have a universal option for viewing sites in desktop mode, rather than having to select it for each individual site? The stock browser on my old phone running 2.2 had this feature, it seems bizarre that they seem to have taken a step backwards and removed that feature in later versions?!