You'll be able to see the ISS tonight & tomorrow from Hawai'i. If you check out the Heavens Above website, you can see the times it will pass overhead and the magnitude:
http://www.heavens-above.com/PassSummary.aspx?satid=25544&lat=21.29433&lng=-157.8344&loc=Honolulu&alt=0&tz=UCT10
You can really see it at 6:56 on Friday.
You can also use Heavens Above to find Iridium flares, which are also cool.
Thanks to Richard Wainscoat for the reminder e-mail.
