I was quite excited about the launch of Microsoft Live Search Beta so I tried it out. I noticed when I do a search one of the strings is default to 'mkt=en-us', and I'm able to see sponsored ads from the US, though I'm browsing from South Africa. I'm not using a proxy at all to hide my IP and I'm using Firefox. Does anyone outside of the US also notice this? If this is true, I'm sure Microsoft should fix it pretty soon, as I don't think Adcenter advertisers want to receive clicks outside of their "set" countries/regions.