Tip - No Firewire Port on Computer

I have a Sony TRV27 camcorder that usesa IEEE1394 Firewire connection to transfer my video tapes to the computer. Unfortunately my new computerdoes not have a Firewire port to connect to. It also does not have a spare PCI slot to add a Firewire card. I'm using Windows 7 and using Pinnacle video software. Is there any way to download my videos to this new computer? Is there a Firewire to USB adapter available? If available, will it work? If I'm forced to use an anolog connection, will I loose video quality?