In upgrading to 2010 I lost my connection with this device. Sometimes it's hard to tell what is the chicken and what is the egg (what caused what) but if it's any help, here's my experience in getting connected again after a fresh install to PCLOS-GNOME 2010. Of course, until you are somehow connected, you can't visit the repos to see for sure what you have or don't have already onboard [edit - you can use command line to search for apps but I don't do it often enough to be quick at it.]. I thought it was good news when I opened PCC>Network & Internet>Network Center (or Setup New Network interface,etc....) and saw that my device was listed. You would assume if it is seen it could be opened and setup, right? Nope. You'll just see "Unable to open device /dev/ttyACM" [edit - rather, that was my experience]. I tried in terminal as root to run "usb_modemswitch" in case that would make it accessible. Nope, command not found, or something like that. In "PCC>Hardware>Browse and configure hardware" the good news is that you can find the device under "Other Hardware" with all it's details suggesting it should be fully accessible.
I shutdown my machine and attached the hard drive that had my last previous install of PCL G on it rebooted and opened the file browser and found the old Desktop folder. I copied and pasted Gnome PPP to my new desktop, opened it, filled in a few blanks - my modem ph. number for user, Cricket for PW, #777 for ph.number to dial, and (in my case, typed in /dev/ttyACM0 for device and it worked. I didn't think it would be that easy but this is after two days of feeling like a blind fish flopping around on a beach and hoping for heavy rain or a lucky flop into the water.
Then I checked in Synaptic and it shows Gnome PPP as installed. I don't know if that's cause I just dragged it over for the front end or if I already had it somewhere, being hidden and useless. Without that GUI on my desktop I was seriously stuck. I would suggest it would be a small gap to fill for the devs to make this type of connection doable in a new installation.