We will leave the LoginRpx Web part in the next version, but will focus on moving away from the Janrain's service, as we received many complaints regarding its functionality in the free edition - especially considering the fact that it is not possible to customize the look and feel of their widget using their free service. We will therefore introduce another implementation that will use our internal implementation and that will not depend on any external services. At this time we do not support switching from one implementation to another - this means that you should choose one implementation and stick with it after the site goes live.
The registration process will remain pretty much the same, but there will be much more space for customization (especially UI customization) in the new version. On the other hand, we will not be able to include all providers that Janrain supports, but the main players will be there: Facebook, Yahoo, Google, Hotmail, Twitter, MySpace and LinkedIn. 

Thank you - I think it is worth waiting for next release in October rather than getting stuck with Janrain's service.