Not a terrible idea, OP.
Biyombo is extremely raw. He's 20 years old. He was drafted #7. He's the kind of young prospect that could develop into a real talent... and yet he's presumably "tradeable" because he's yet to light the world on fire with his play. Biyombo averaged 10 rebounds and 2.4 blocks per 36 minutes. I guess he reminds a lot of people of Serge Ibaka. Both coming from the DR Congo... both raw coming into the league. Similar play style. Freak athletes. Biyombo is a bit shorter, but he's got a 7'7 wingspan. Kid was drafted in the lotto for a reason... he's a project with massive upside.
Bradley is young too ... only 22 years old. But he's basically a one-dimensional backup player. He's definitely not a SG (too small and too offensively inept) and he's probably a long-term role player if he sticks at PG. His stock should be pretty high right now though, because his aggressive defense has turned heads. His upside is limited, IMO. There's only so much success you can have with a offensively inept 6'2 180 pound "shooting guard" and this league is absolutely littered with quality PGs who lack Bradley's defensive intensity, but own him in every other regard. I don't believe you could get Biyombo for him for the same reason that I don't believe you could get a lotto pick straight-up for Bradley, but it's a solid effort at an idea. Adding Melo to the deal might help... but I don't know if Melo will even be in the league in a couple years. Fab is big, but kind of a stiff.
I'll be the first to admit that I haven't watched a ton of Bobcats games this season... so I don't really have a ton of first-hand knowledge on what he's like as a player. But I have to guess that nobody on this thread has watched a ton of Bobcats games either... so it's kind of comical how quick some of you are to say "He's a bum!" without any frame of reference. Kid seems like he's on the right path for a 20 year old from the Congo. Anyone have any guesses where he'd be drafted if he came out in this draft?
Call me crazy, but I'd gladly do this deal. We need young bigs and this kid seems like he's a big time prospect. I'd love to get him for a year under KG's mentorship.
http://www.youtube.com/watch?v=pIdhFeLiLx8At least he's got Mutumbo's finger-wave down (another player from DR Congo)