i was going to ask the exact same question...

i successfully used sling on my former treo (700p) i reinstalled on GVM and identified everything as a treo 700p - i gave sling 4MB of memory (it is a hog)
it finds my box and then for lack of a better word- stalls out

i dont know if it is a dbcache issue (treo's and garnet are "infamous" for dbcache issues) or a communications issue