Command Request: rename a column

[AJ]

I think it would be really cool to be able to rename a column, or, more 
generally, a move command to move data from one column to another in the 
same CF without the client having to read and resend the column value.  
This would be *extremely* powerful, imo.  I suspect the execution would 
be quick and could even be made atomic (per node) as I suspect it would 
mostly entail only reference updates.  Has anything like this been 
discussed before?  Seems like such a natural operation for a 
hash-table-like data store.

aj