Ok, so I spent like 15 minutes looking at the cross page possibilities with IMC and quickly realized the Communications class simply isn't robust enough to pass requests beyond the current page.  So then I though, well how could you do it?  It occured to me you could use some type of messaging service to send data entries from one page (form fields, for example) to another page and pickup the user entry.  Through messaging, this should be possible without writing anything to a database. 

Wouldn't you know, on my very first Google trying to get some messaging background info, I run across this Snowcovered listing.

http://www.snowcovered.com/Snowcovered2/Default.aspx?tabid=242&PackageID=2316&search=ucanuse&pagenumber=0&sortby=&tagid=

Looks like it does exactly what you're talking about, and at $14.95, I can't even justify researching this any longer.    They supply the source, so if you really want to understand what is going on, buy it.  I may buy it myself.  $15 vs a couple hours of research?... no brainer.  Check it out!