[scribus] Scribus logo

[John Jason Jordan]

I am starting to work on a presentation I will be giving on Scribus.
For some of the slides I want to use the logos here:

http://www.google.com/search?q=scribus+logo&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

1) I assume it legal for me to use these logos in my presentation, but
if I need permission from someone, please advise.

2) I was able to download the main logo (the round one) as a vector PNG
file, but the rectangular ones appear to be available only as low-res
bitmaps, which won't look very good when displayed several meters wide
on a movie size screen. Are the rectangular ones available somewhere as
vector images as well, or at least in high resolution?

Thanks in advance.