Thank you all for your replies! I just found a pack of samples in Freesound that could be what i'm looking for (individual notes from a Rhodes). The files are in .aif (i think Pd can read those, right?). The whole pack (53 notes) weighs about 110 MB, so i'm assuming the sample rate is quite good. I'll let you know how it sounds. The samples are located here, if anybody needs a Rhodes sample.

http://www.freesound.org/packsViewSingle.php?id=3957

Pierre

2010/4/15 Spencer Russell <spencer.f.russell@gmail.com>
On Thu, Apr 15, 2010 at 6:57 AM, Pierre Massat <pimassat@gmail.com> wrote:
> Hello everyone!
>
> I just got a brand new midi keyboard and i'm very excited! Anyway, i was
> wondering if anybody knows where i could find some good quality samples of
> electric keyboards (like the Rhodes), for free (yes, i m using Pd also
> because it is free and because i m not exactly a millionnaire, although i
> like it so much now that i don't think i'd use anything else if i were that
> rich. Anyways...).

If you're looking for soundfonts there're a lot at:
http://www.hammersound.net/

A lot of them are terrible, but there are quite a few usable ones in there.

To use them in FluidSynth (or using the QSynth front-end) you'll want
to get them in .sf2 format. Sometimes they're in .sfArk format, which
is a compressed format that I think you need to use a windows tool to
un-compress. It may work in wine, though.

-s