These days, I won't convert adventures between systems - I really don't have either the time or the inclination to do so (if I'm converting, I figure I might as well create my own adventures whole-cloth). So, I won't buy support material for a game that I'm not playing fairly extensively.
That said, I'm still not off the fence regarding 4e. It may be that my group loves it (looking doubtful, but possible), in which case we'll switch over and drop support of (3.5e/Pathfinder) Paizo. It may be that we hate it, and stick entirely with 3.5e, in which case I wouldn't buy any 4e Paizo products (or Pathfinder ones, for that matter). It may be that we hate 4e, but elect to switch to Pathfinder when it's available (frankly, the most likely option), in which case we'll stick with Paizo (this scenario is predicated on them not going 4e themselves, of course). Or it may be that we play all three, in which case I'd buy Paizo regardless.
Not terribly clear, I know, but that's the answer.