4 points:
1) Just FYI - I'm a 11 year UNIX veteran, I'm not a newbie. I think I know how to a use a search engine. Don't you think I would have tried that first?
2) 1st link: I've been trying to get this guy's driver to work for over 3 months. I even tried his pdadrv package off of blastwave.org. We've been in direct email contact during this time and I still have no working driver. The driver causes my system to panic when I press the HOTSYNC button. Erik Hovland does not have access to an UltraSparc at the moment. So troubleshooting it has been problematic. I'm almost tempted to just a buy an ultra 10 off ebay and send it to him. The key word here is: WORKING
3) 2nd link: Sun's PDASync only works with serial cradles, not USB. I'd have to get a USB to serial convertor, which I'm trying to avoid.
4) I'm sorry but there are not thousands of options. There's not even a commercial option that supports USB. If there is, show me. I'll buy it.