Fair use for the logo?

[Juhani Connolly]

Myself and a colleague will be doing a presentation/usecase on flume at 
"Hadoop Conference Japan 2013 winter", trying to get it more awareness 
here. Is it reasonable to reuse the logo within the slides? How about 
diagrams from the docs? I'll be sure to post the slides here after the 
event, though they'll be in Japanese so probably only useful to a 
handful of people.