I think openID will become more and more demanding soon enough. There's already over 250 million accounts for it now. I'm going to research doing it in php. Although not sure if it's best for websites to make their own or tap into one currently made, such as Yahoo's or WordPress's system, which both are openID compatible. I'm thinking it will be a good money maker for websites that want a openID compatible login system on their websites. What you all think?