This is what I thought as well.
Another 3 team deal I have seen in some conversations on other sites is, between Philly, Seattle and Boston(this is just discussions amongst people so don't flip out)
Philly would send Happ/ Drabek + to Boston for Beckett. Then Boston sends those 2 plus Bowden, Anderson, Reddick(maybe 1 more lower level guy) to Seattle for Felix.
You have to think Beckett could command as much as Halladay in a trade. And he's 3M cheaper this season. He might be the better bet over the next 3-4 years compared to Halladay(debatable I know), just sayin, it isn't crazy to think this may be possible. And how it could work out for all teams involved.
Philly gets another front line SP. Boston gets their coveted Ace to replace Beckett. And Seattle gets an ass load of talent for Felix.