Sad to say, it isn't hard to predict what Apple will do based on its history:
iPod shuffle: 2GB ($49) and 4GB ($69)
iPod nano: tall redesign, 8GB ($149) and 16GB ($199), multiple new colours
iPod touch: slight redesign, 8GB ($199), 16GB ($299), 32GB ($399), 64GB ($499)
iPod classic: may drop to just one model, 120GB ($249); I haven't seen a 1.8-inch drive above 160GB.
The bias is definitely towards the iPod touch now. Why promote an iPod classic other than to...