Originally Posted by gkostolny
Well, turns out my home shop was full of shit. Scuderia in SF says it's under warranty until August '14, so I left it with them. They agreed that it sounds like the starter relay, and fortunately they have one in stock. Fingers crossed!
Thanks for all the suggestions, and I'll update when I get the bike back.
So the folks at Scuderia were kind enough to replace the main starter relay under warranty same-day, and so far the bike is starting just fine. May have just gone bad in an invisible way.
Will post back up if it starts misbehaving again.
Thanks for all the help & insights!