Multi-page forms will be coming as part of either the 1.4 or 1.5 release later this summer.

Which release it falls in will depend on which release we include field calculations and the payment processing add-on for PayPal integration. So it depends on which of those major features (among others) we include in the 1.4 release.

The one that doesn't make in 1.4 will be introduced in the 1.5 release.

We have a laundry list of both core plugin features we plan on implementing as well as add-ons for various 3rd party service for easy integration.