Working on an icon for your new iPhone 4 or iPad app? Fresh from WWDC 2010, Cocoia have updated their PSD resource file to include not only the original iPhone/iPod touch and iPad dimensions, but the new iPhone 4 114x114 Retina Display resolution as well:

Again, if you appreciate it, tweet this to help your fellow designers and developers make nicer icons for iPhone 4 (and beyond).

As someone who admittedly skips over anything with a poor icon in the App Store, here's hoping Cocoia's generosity -- and passion for iconography -- is widely embraced.