I don't know if you are like me, but if you are then you need to calm down first, otherwise more mistakes might happen.
Nothing bad has happened, yeah it was kinda stupid to erase the internal memory but so what, everyone does stupid stuffs :laugh:
Just download the ROM, whatever your carrier based ROM is, from here,
http://sbf.droid-developers.org/phone.php?device=0
Then open ADB and follow the instructions here, Method 1 is recommended. If you have drivers installed on your PC, which I suppose you have, then as soon as you go into bootloader mode, your device will appear on ADB.
That's it.