Hmm... it's certainly worth pondering. Of course we've already read how Gene Simmons has offered Tebow a deal with his Arena Football League team.
At least in this case, though, I doubt Tebow could learn the playbook fast enough to make much of an impact.
I just hope Tebow, if he truly is interested in being a professional football player, doesn't get pigheaded and insist he must play in the NFL now or else not play at all. Right now, he is more valuable outside the NFL than he is inside it. The NFL has made it clear they do not want him, but that doesn't mean he has to give up forever. He just has to bide his time. Plenty of rejected quarterbacks ended up back in the NFL in their early to mid-30s and having a pretty good career: Todd Collins, Doug Flutie, Rich Gannon, Tommy Maddox (and yes, Maddox did just what I am suggesting and spent time in the XFL), the list goes on.
There is a big world of professional football outside the NFL. The UFL, alas, is dead in a junk heap of overspending and lack of revenue, but there's a couple of domestic minor leagues, the arena leagues, and the emerging foreign markets.