MSN is jump-starting adCenter with a bang with $200 of free ads for signing up. I tried the sign up but it must not like Macs because I couldn’t select the currency on the payment ($5) form, and when I submitted it an error came back that I hadn’t “agreed” yet. I’ll wander over to firefox one of these days. It also seems like they are trying to trick you because you actually have to copy and paste the code on the first page to the third page, but maybe that makes their margins possible. If just 1000 sign up, that’s $200,000 of ads they pay out to advertisers, which seems to be some pretty expensive word of mouth (WOM).