Hi Hunter...I'm new to JavaScript and LiveCycle Designer ES4 myself but I've managed to figure out how to send an email of my form via a button. Although, now I'm trying to figure out how to change the attached form name it defaults to, the email still works with a field inserted into the subject and body.
The button I created is simply a submit button but with the "Control Type" as regular. I've also added JavaScript to the button. This works with MS Outlook 2010. Hope this helps...
var SbjtStr = "Property file for " + Page1.BC.rawValue; (Page1.BC.rawValue is a field in my PDF form)
var bdymsg = "The attached property form (" + Page1.BC.rawValue + ") is sent for your disposition.";
event.target.mailDoc(false, "Fb@whateverdomain", "", "", SbjtStr, bdymsg);