Well, I wasn't planning on spending a whole lot. Was taken in by the...value...of ValueRAM lol. But I suppose I could spend $150-$200 on good OC'ing 1GB RAM.
The stuff generally can't handle high enough vdimm to compensate the higher clocks. You'd have to really loosen timings and even then I wouldn't gurantee anything beyond 30-40MHz if you're lucky.
You can just as easily use a divider though if that's what you're getting at