I was reading the front page news item about the 8330 leak of 18.104.22.168; and thought i'd respond in regards to your comment about thinking the 8530 was the low-end cutoff for 5.0
It has been my understanding since the time that RIM officially announced 5.0 that ANY device that was currently sporting a 4.6 official device would definitely be seeing a 5.0 release, and that SOME 4.5 devices would be getting it. That is the reason we saw a 22.214.171.124 leak for the Pearl Flip, as it natively runs 126.96.36.199 (on VZW). I'm actually a bit surprised to see it on the Curve, given memory limitations; but if the Storm and Pearl Flip versions are any teacher; it's not much bigger of an OS.
Well, just thought i'd point out that little tidbit of info!