Simple Batch Job Handling

Hi!
I was told SB could be a good solution (-:

What I have now:
Machine with 8 cores and 8 scheduled jobs running every minute to check
if there is new row in one queue table (rows assigned to queues/job by using modulus 8 on identity column).

The scheduled jobs run an stored procedure, that filter "its own" rows from queue table (scheduled jobs sends input parameter to proc, so proc can identify which queue it is).

Inside the proc an dynamic, local cursor is used where I order-by on column corresponding to source of request, since some peoples requests are more important than others ;^) Every queue handles more rows at once if exists.

This gives me 8 paralell queues, but since some requests take longer to handle than other I can see periods
where only 4 queues running and the rest does nothing while jobs are waiting. There are probably other drawbacks, please tell me.

How to solve this with Service Broker?
Do you know some good links with examples?
Can SB support the need of ordering? It should not be first in - first out, it should be: most important first...

Best Regards
Bjorn