TODO list elements

I studied the TODO list without finding these elements. How about
including then on the TODO list ?

1. Better money types. As it is now, it is unusable for large amounts,
because it really maps to an 4 byte integer. The best solution would be
to make the size configurable, but maybe it could do to make it 8 byte
integer?

2. An ALTER TABLE ALTER COLUMN new-type. Of course the will be a risk
of loosing information here, but that's the users problem if he eg.
want to convert a 50 character field to 30 character.

On a related topic, how far down the list is the row level locking? Will
it come in a not too distant release?