I have been asked about adding in this functionality as well, but I have not come up with any solutions. 
The other suggestion was to link alert incidents based on time recieved, ie. anything after an hour goes into a new incident.

Any ideas to impliment this out there?

.. my first guess without testing it (sorry for that)

• Created on "Master" ticket representing its goal (i.e. Server X Status messages)
• Create an incident rule to

1. capture the email using its unique specifics
2. set workitem_link_parent_number to the "Master" workitem_number
3. set workitem_link_type_lookup_id to the appropriate link type you need (lookup in Admin>Lookup.link type) is another issue as that field is not writable.  Have no solution for that right now.  The deafult will be used by HD, which is "1" I guess.
4. set any other item to whatever value you think you need (Category, Queue, etc)

Another approach:
When you can influence the msg you server sends, you could add the "Master" ticket number as a default so HD will see the email ass an add-on to and existing Incident (look in admin>email-inboxes).  But then the email is added to the [Comment] instead of creating a Ticket for ecery message.

I would advice you to create a seperate Queue for these tickets so they do not influence you day2day job and reporting.

If you gonna try this, let us know your result!
If you have a working solution in a different way, also let us know!

I will reward the effort

Guido