No way about changing the logo. We are already following Ubuntu's
guidelines. We have a long name and we have to deal with it (I wish we
were called Gubuntu, but the reality is another one).
Ubuntu Sans only supports Latin, Cyrillic and Greek characters, whilst
Droid Sans supports Armenian, Arabic (not completely sure about this),
Ethiopic, Georgian, Hebrew, Japanese, Thai as well as Latin, Cyrillic
and Greek (and probably more that I'm missing).
I we talk about beautiful typefaces, I would suggest Roboto, but
again, I repeat, *Droid Sans is probably one of the most complete
fonts out there*. We could stay with Cantarell, of course, but I
believe offering a consistent desktop experience for all languages
should be an important aim. Remember that you can always change it to
the font of your preference (I myself will probably change it to
Roboto), but the defaults are very important.