Jira ticket notification hook?

Hi Everyone,

My company is moving from Trac (which has excellent SVN integration)
to Jira which seems to be a bit lacking. One big issue is that we'd
like people who are watching a ticket get a notification of the commit
when a commit references that ticket. Jira doesn't seem to support
that natively and most of our users don't want to be notified about
*every* commit- just the commits referencing tickets they care about.

I was hoping someone here was aware of a svn hook script which
implements this feature?

Thanks,
Aaron

-- 
Aaron Turner
http://synfin.net/
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
    -- Benjamin Franklin
"carpe diem quam minimum credula postero"