I'm extemely excited about tiger being released...but...well, I don't know if it's worth buying. I have a 1ghz 12in PB right now, which I love...however, I plan on purchasing an iMac in the fall, and the powerbook will complement the iMac (I do too much heavy lifting on my powerbook sometimes). Am I correct in thinking that if I buy the iMac, I can also install Tiger on my powerbook? or do I have to get a separate installation for the PB? If it's latter, then I might as well hop on the Tiger train before that rebate runs out.