Asynchronus PL/SQL - Webservices Call

Hi, 
 
We have a requirement to call a PL/SQL procedure in asynchronous mode with
in the transaction.  The Procedure1 is a trigger of a table which calls a
web service with in the procedure Procedure2 using 'utl_http'.
 
What are the options to call the Procedure2 as not part of the transaction
OR is there any way to call the 'utl_http' call asynchronously?
 
There are few options we consider:
 

*       One way handle this is as part of the application and storing the
value in a table and schedule a procedure in the oracle job to handle this.
*       Other way is to submit a job in the oracle jobs with in a trigger to
call the procedure 2. But The question is: How does oracle handle the job
which is submitted the part of the trigger? Will that be considered as part
of the transaction?
*       Third way is to use the Oracle streams and using queues the same
mechanism of Oracle jobs.

If there any simple way to achieve this.
 
Thanks in Advance.
 
Raja.

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