One of the (only) things I miss in my move to the Mac is TortoiseSVN, a really nice Subversion client which integrates with the Windows shell giving you all the Subversion commands on a right click context menu. SCPlugin for OS X is coming along, and what they have is very nice, but they don’t have it all yet… still, good effort guys, thanks.
One function missing from SCPlugin, and from the Subversion bundle on Textmate, is the ability to easily set the SVN:Ignore property. Setting SVN:Ignore on a file or directory means that SVN will never bother you with trying to add or commit it. I’m always heading for the command line, then getting confused and failing to remember how to do the business… so for my benefit here it is (and embarassingly for my memory it’s actually quite easy):