Reading the blogosphere coverage of both Google and Facebook launching their own data portability programs - Google Friend Connect and Facebook Connect - I realized one thing: there is at least one type of services that can be seriously damaged by general availability of both programs to website owners - those working in the blog commenting field, like Disqus or IntenseDebate recently acquired by Wordpress maker Automattic.
I have already mentioned in my own piece on the subject that I have a feeling that Facebook Connect will get much more traction among webmasters for a simple reason of helping them get an additional distribution channel that could let their sites potentially reach millions upon millions of Facebook users and convert some of those Facebook users seeing their friends interact with the sites into regular visitors of such third-party websites as well.
The viral growth effect is very similar to what you get when you ask your visitors to bookmark your site on Delicious or vote for it on Digg - but in this case you will only have to ask users once