I've seen many members here with help threads of possibly bricked phones, and I'm throwing this together to try to help.
If you are stuck on the samsung logo, or the phone triangle exclamation point computer screen, or getting too many force closes to do anything, I think this will help.
First, if you have clockworkmod on your phone and have the update.zip on your SD Card for CWM go ahead and pull the battery. Press the vol up and down keys and power the phone back up. This that you see should be stock SF (samsung fascinate) recovery. Select the apply update.zip and that will take you into CWM. From here, you can apply your restore.
IF you cannot get into CWM, continue.
Pull the battery out, and connect your phone to your computer. Grab the restore files from here: Odin Restore files to get you to stock - xda-developers and follow the steps to restore your phone with Odin. BE SURE NOT TO FLASH IT WITH THE PHONE OPTION, USE PDA.
Once you are done with that, you will need to re-download and install the superuser.apk that should be on the market. Check to make sure it will still ask you for su permissions (so grab root explorer to test).
Mount your phone to your computer, and grab the update.zip file from here: Clockworkmod installation how to for windows / *nix - xda-developers and drop it onto the root of your SD Card, and follow the steps above to re-flash your restore.
And if worst comes to worst, as long as you can get the Odin Stock Restore to flash successfully, you can re-root, and re-flash CWM to get back to at least having a working phone.
If you need further assistance, please reply to this thread so we can all try to help eachother out.