Hi Tom and thanks again for posting,
The qRules OpenUrlInBrowser is not browser compatible.
I would recommend using Web parts for this with connections in between them. We covered this in Module 11 of class.
You can create a page with an InfoPath Web Part on top and a Content Web part underneath. The form on top sets fields that are promoted to the web part connections (output) and the page on the bottom is configured to get input from the top web part to use when displaying the page.
Of course, this may not look exactly like what you were hoping for... but worth a shot. You could have the InfoPath form switch to a separate view after submit with guidance text "Please use the control below to schedule your conference" or something like that.
Good luck!