I will simply link to two posts which have directions on how to achieve permanent root in the meantime while custom kernels are released with root incorporated.
xda-developers - View Single Post - rooting
And this one is for the epic 4g, but it is confirmed that same instructions work on fascinate.
joeykrim-SDX - Permanent Root for Epic (and Verizon Fascinate) - Confirmed
Edit: I have not tested this yet, as my delivery is scheduled for tomorrow.