Although Analog has yet to put "Decisions" up on their webpage, it's now available as a free ebook from Fictionwise. So:
Click here to download "Decisions" (Analog, January/February 2004)
Click here to download "Time Ablaze" (Analog, June 2004)
And if you want to find out what other Hugo nominated works are available on line, Interaction has an entire webpage devoted to Hugo Nominee Links.