This is already able to be done via a generic Notification and a Job Variable that contains the Interested Parties e-mail group/SMTP address.
1. For each job you care about, create a job Variable callled "NotificationEmailAddress". This will be the e-mail address notifications for THIS job get sent to.
2. Create a notification called "Job Failure Notification" and instead of the Subject use something like this:
{JOB(Active|Name)} - Failure Status
Recipients would be:
{JOB(Active|Variable|NotificationEmailAddress)}
3. In each job that you've actually created the 'NotificationEmailAddress' variable, change the flow to 'Always' 'On Error', run the notification created in Step 2.
Now you have a single Notification created that can be reused by any job you choose, as long as you have a job variable set on the job for who to notify. This might sound tedious AFTER your jobs are all set up and the server has been in production for a while, but it's a very simple (in my mind) way to create a generic notification with varying e-mail addresses per job. Optionally, you could have your IT group's e-mail address on the CC line so you receive all of them.
Brian