If you get this message after trying to clean install Lion from a USB drive (the install for me seemed to hang on my i7 MBP), you can try this as it worked for me:
1. Power off the machine.
2. Unplug the USB stick and power.
3. Replace the USB stick, but in a different USB port.
4. Hold down CMD-OPTION-P-R keys and turn the machine on (hold them until the machine reboots itself for a second BONG sound.) This resets the PRAM, if you want to google it
5. Hold down Option and select your USB installer.
Should bring you to the familiar language selection screen.
Hope that helps.
PS-Hey Apple. I applaud the diskless install, but why not let me choose clean install to begin with? Restarting and “upgrading” just broke crap. I broke more crap trying to get a fresh install. Not easy.