:happy dance:
it's here it's here!
either a random coincidence or a suggestion: if you uncheck the show beta box and then update your impulse, then recheck and update again, it showed up for me anyway. Don't know if that's a coincidence or if doing so sent it out to find if there were any betas available. regardless, it's here it's here it's here!!
Nope must be a coincidence because I did what you wrote and still no beta. Oh well all good things come to those who wait.
Update 20 mins later: It's here, it's here 
