Filed under: Google (GOOG), Microsoft (MSFT), Yahoo! (YHOO), Citigroup Inc. (C), Bank of America (BAC)It seems that I get about five credit card offers per day in my mail (and I can see why many Americans are broke). Actually, a study from Synovate's Mail Monitor shows that there were 6 billion such offers in 2005, up from 2.7 billion in 1995. Yet, the response rate has gone from 1.4% to 0.3%. In other words, credit card issuers are looking for new channels. And, of course, the internet is the next frontier.One of the key players in the space is CreditCards.com, which has filed to go public. Basically, with the site, consumers can research, compare, and identify various credit card offers. For each approved application, CreditCards.com receives a fee.From ...