We're moving from iframe landing pages to using embedded forms when we migrate our site to Sitecore in September. It would be great if Marketo can chime in here with an update on proper progressive profiling (if the issue still exists that Jan raised earlier up in this thread) and pre-population of known user data.
+1 here as well! There's no reason not to allow this; it's more of a situation of not preventing it rather than enabling it; the munchkin code is present, and it's allowing PP, so this should be simple. Need it!