I think the above posts about development spots in general is a good debate. Something definitely needs to change if these spots are real development spots but the reality of them at the moment are "training fodder" and the teams/coaches aren't really incentivised in developing players as the league is not stable and a coach is really only trying (a) to win a championship and (b) keep his job not trying to develop the players.
I think the team that does it the best is NZ, but this is also in part that they are also looking at developing players for the Tall Blacks team, so they bring in the development players, don't pay them and then let them go to College (Issac Fotu, Tai Webster, Jack Salt, etc) and guys like Rueben Te Rangi, Corey Webster move into the team. But I can't see any of the Australian teams operating the same system where say for example we think an Owen Odigie or Mirko Djeric might be a boomers player so lets play him some minutes, etc. None of the other 7 clubs are trying to develop the players for the Boomers, but rather who is around who is good enough to train with us.
As for young Aussie talent I think Cairns and Townsville do it the best, but that's mainly because they have low cash reserves to pay players, so they fill their benches (9th & 10th man) with young guys who give a go (Mitch Norton, Mirko Djeric, Shaun Bruce, etc), but generally coaches who have money to go for championships and hardly let those players get on the floor and they rarely develop.
I think there could be real potential about the development player spots, but it's hard for the NBL to influence each club to take bigger risks on real "development" players rather than "very good juniors" who may not develop. An example from the AFL is Majak Daw who has become a massive marketing tool that the AFL and North Melbourne promote as a great story of a Sudanese kid playing AFL. He has been on an AFL list for 4 years and played 6 games yet most people know about him. The other post about next big Sudanese talent is that a lot of clubs wont take a risk on these players as development players as they go for safe training guys, guys who can run an offence, understand defensive rules and don't stuff up training rather than developing a raw talent into being a better player.
I'll end the rant now, but I suppose at the end of the day, "don't hate the player, hate the game."