It's not bricked at all, don't worry.
If it's showing the Rubix, it's already past the initial bootloader, your ROM is probably just corrupted.
Did you bootstrap your recovery already? If so, just do a battery pull, put it back, and it will boot into recovery. From their you can reinstall your rom or a system wipe could also solve the problem.
If you haven't bootstrapped yet, you could also try this Boot your Motorola Droid X into recovery mode
Worst to worst, you'll need to use the SBF file. There's a lot of threads here about that but try the options above first. You should be able to just reinstall your ROM.