I'm already using MySQL for storage and also for queuing on the number
crunchers...
The main problems with Storable are that I have to add some sort of protocol because every host has different functions which must be triggert and it is nearly impossible to use it from other languages.
If you can't coerce your data into CSV format (which is after all native RDMS format) just write a serialization class in all the langs you need. Alternatively look at YAML or XML as the storage/transfer format....