CPU clock speeds

[Ramonero]

I was hoping someone could help me find a set of metrics to compare the performance of mobile CPUs (mainly powering PDAs and smart-phones). I have a bunch of attributes for each CPUs, including their architecture and clock speeds. However, I understand that it would be misleading to compare CPUs using clock speeds, as these mean different things across different architectures. Do you know of any concordance tables (1 Mhz in family “X” equals n Mhz in family “Z”)? Do you know of any commercially available survey that compares CPUs using benchmarking software? Many thanks for your help!