bufferbloat on Nokia N900 (and probably anything with GPRS?)

Hi!

GPRS/UMTS modem on N900 seems to have rather severe bufferbloat problem -- after area of bad signal is encountered, pings are in 200 _seconds_ range.

I guess it would be good to reduce the queues, and probably drop packets when signal is too low.

Any ideas how to make GPRS more usable?
Pavel

(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html