Did a fair bit up there quite a few years ago... where abouts is the cave... I certainly cant think of anything like that. Sounds great.
As for the bouldering there is massive potential just about everywhere. One particular spot exists within a couple of hours with 3 fields of upwards of 100 free standing boulders in each... thousands of problems to do?? Pain in the ass landing on spinifex though... real pain in the ass! Have been attacked by wildlife from the dark recesses whilst bouldering in alice too which is a bit scarey.
Close to town there is one brilliant boulder problem in Charles Creek... overhanging prow with soft sand landing... V7/8? Still a bouldery route sporting old bolts waiting to be knocked over there too at about 26 from memory. Doesnt sound nearly as grand as he developments you describe however!