Recuring event mods available?

I am hoping that there is already a recuring events modification available. Specifically I am looking to be able to schedule an event every X days, or every month or every year (holidays specifically).

if it is available can I please have the link (why reinvent the wheel)- and if not - I guess I'll just write it myself. I can post back the modification if you want to add it to the currently available version when I am done. Just tell me where you want me to send it (here of sourceforge).

<off the top of my head>
Will probably be touching the ltweventmgr.php, ltw_classes.php (ltwevent specifically), the DB structure...and the ltw_install.php if you want it to be automagically done on an install - rather then just a mod. Please let me know if any of these are completely "untouchable" or only partly.
</off the top of my head>

If you do find or make a mod, please post about it here so it can be added to the build.

I'd be interested in that as well.

Port