Bricked LG Optimus P999 using ROM Manager

I have the LG Optimus P999 from Wind Mobile. I downloaded ROM Manager and tried to flash a Cyanogenmod ROM (cm-7.2.0-p999.zip). The backup and flash said they went OK. But when it rebooted, it froze at the second LG logo and won't go anywhere. Booting into recovery mode did nothing. It took many tries to get the LG Optimus unbricking tool to recognize my phone, but I finally got Clockworkmod Recovery to install on it. Now when I boot into recovery mode, nothing works because it can't mount the SD Card. My next attempt was to flash stock ROM back to it, but I can no longer get the tool to recognize my phone. Have I totally bricked my phone?