Hey Lickman,
Post your clocks and your config file and we might be able to help you out.
You will find that Scrypt is a very different beast than Bitcoin and that you need to retweak everything separately to get the best out of it. I have heard that for the 79xx cards the sweet spot is something like Engine clock = 0.7 x Memory Clock. You also need to up the intensity a lot compared to Bitcoin, maybe start around I = 13 and tweak your clocks, then push intensity up to the limit of your rigs stability. Check around the forums and see what settings other people are using.
Here are my clock settings under MSI afterburner:
7970 Radeon
Core mV - 1169
Power limit - +20
Core Mhz - 1150
Memory - 1643
GUI Miner scrypt alpha
Thread concurency - 21312
Vectors - 1
GPU threads - 1
Worksize - 256
Intensity - 13
Use stratum - yes
net Khash's 545-565
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I aiming to get this up around 700 or 800 Khash's range, is there something I need to add to a configuration file somewhere, or an extra flag value I need?