I'll fairly new to the MAC world. Currently I have a G3 Powerbook running OS X Panther edition. I absolutly love it. I am considering buying a new notebook. Either iBook or Powerbook. I haven't decided. Which should I go for?

Thats not my question really. My question is, I see Steve Jobs will be introducing OS X "Tiger" at a convention at the end of June. Will this be just a information type thing or will "Tiger" be available soon after that date? Basically I want your opinion on whether to wait for "Tiger" to buy or just buy now. I don't know what history tells about Apple releasing new OS's. What do you think?

Thanks for any advise.