Two thoughts here:
a) Try a mirror - the Friends Of Eclipse site gets about 1000k/s, but
it's a pay-per-use thing at $35/year. Of course it does help the
Foundation afford bandwidth and servers, so it's a small price to pay.
There are also some pretty fast other mirrors out there in Canada and
the US. (I can't speak for the rest of the planet as I haven't tried
them.)
b) This isn't a PDT issue, so try posting in eclipse.newcomer or
opening a bug if you feel it's a real issue.
Note also that Eclipse 3.4.1 was just released yesterday so there's
going to be a lot of bandwidth saturation as everyone grabs the
update. In another day or two, there will be more mirrors available
and you'll have more places to get your bits.
If you'd like to try an unofficial* PDT build, you can get it here:
http://emft.eclipse.org/pdt/downloads/