Just curious as to what avenue can I take to make a recommendation or suggest a modification to the core engine?

Noticed that the templating engine appears to have a LowerCase method, yet oddly enough no UpperCase equivelant.

I have modified my local copy of {SilverStripeInstallDir}\sapphire\core\model\fieldtypes\DBField.php to include an UpperCase method - but figured I'd mention it to those more familiar with building/packaging/releasing this CMS.

Any suggestions?

Hi,

You could submit your modification as a patch:
http://doc.silverstripe.com/doku.php?id=submitting-patches
or discuss it on the dev list, particularly if you are doing something complex:
http://groups.google.com/group/silverstripe-dev/topics

Hope that helps,
Ben