Yea, I was never really dead set on rock but I did really want it. It basically came down to not being able to find anything that I liked locally and you can forget paying shipping for rock if ordered online! I'm not disappointed in using driftwood at all I've got a lot to choose from and think it will turn out great!
BTW: Thanks for the lead over at PT.net Kristin, he had both of what I needed and got about 80 nodes of MM and 6-7 stems of Dwarf Sagittaria all shipped for $20. MM has been VERY hard to find and everyone else I saw was selling it @ 40 nodes for $10. I got twice that and the dwarf sag for a good deal IMHO.