OK, I got it working. Everything works fine except for Avantgo, I just don't have the time at the moment to follow the tutorial to change the iptables settings, but it looks pretty simple.
From the synCE sourceforge page, I got tripped up on the following section
I misunderstood the red section (it is not highlighted on their page) and it really confused meThe Driver entry
Second you look at the Driver entry. Read more in the apropriate section below.
Driver=ipaq or Driver=usbserial Your kernel driver recognized your device, good!
Driver=(none) Your kernel driver did not recognize your device. You need to perform some special configuration:
Only if your Linux kernel is 2.6.10 or later: please send a mail to firstname.lastname@example.org and tell us...
1. your kernel version
2. brand and model of your device
3. vendor/product USB IDs for your device (see Vendor= and ProdID=)
Follow the instructions in Appendix A to add options like this, but replace the red digits with the corresponding ones from the output from the command you ran earlier:
If you have the file /etc/rc.local, open it with a text editor and add this line in order to have things working directly next time you restart your computer:
Now run these commands to reload the ipaq module:
After re-reading it a few times, I realized that you do NOT need to configure the vendor and product settings if the driver is showing Driver=ipaq.
I undid the changes that followed for setting the vendor ID etc. and re-tried the setup.
I ran synce-kde and got a message that dccm was already running. I killed all dccm and vdccm and then went on with their instructions. It failed to work.
I then changed over to gnome and ran the connection process from the command line and it worked like a charm
Big thumbs up and thank you to the SynCE team for a great feature,=D> but a little thumbs down for the slightly confusing setup tutorial . I recommend highlighting the fact that if the driver is detected correctly, the rest of the steps in that section should be skipped.
I really hope this post helps somebody. This had been driving me nuts.