Hey Kim,
We are about to do the same. One issue that has come up:
- The follow up page will be determined within the form and if you are like us, using a master form with progressive profiling enabled, this creates a challenge for determining the correct follow up page. Our solution so far is to add a hidden "Asset" field in the form and then use url parameters to determine the page. We have not started, so I do not have any examples to report on as of yet.
Overall, we think it will be a great move, though. The main issue that prompted this was being able to pull in a non-mkto parameter into a mkto form. There is code to do this, but it just seemed to make more sense to move to embedding the form.
I'll let you know if we come across any other challenges!