It's never long before a phone is rooted, especially not if a member of xda-developers can help it.
Well, it looks like Samsung and Verizon's latest baby, the Fascinate, is no exception, as Dirrk, Junior Member of (you guessed it!) xda-developers has just hacked the device into running the Superuser app...aka rooting it. Don't take my word for it though, check out the guide below:
adb push su /sdcard/su
adb push rage.bin /data/local/tmp/rage.bin
adb push busybox /sdcard/busybox
chmod 0755 rage.bin
when it brings you back to your original shell or windows cmd promt
mount -t rfs -o remount,rw /dev/block/stl9 /system
cat /sdcard/su > .