Your network connection of 10mpbs only affects throughput between ppc and laptop, although it is a USB network, because as we all know....everyone rides the bus -.-
30k/s doesn't seem that bad to me, when I used it before I would get somewhere between 20-50kb/second.
30kb/s = 240kbps
Q
id you increase the modem max throughput to the highest setting? (idk if this is an option)
Also, the apache doesn't do Rev-A EVDO.
There are some threads on how to make it faster, as well as stuff like closing directpush, activesync and other programs on the ppc, not to mention throughput on the server end as well as your local computer stuff.
This may not be the answer you were looking for, but all of these factors def. affect bandwidth.
I could be mistaken, in case I've switched the numbers and you were only getting 3.75k/s download speed on a continuous file transer, in which case there would be a problem.