Shrink: Resize your Springboard Icons. There's An App for That.
One of my favorite things about themes for the iPhone and iPod touch, are the ones that make icon sizes much smaller. There is more screen real-estate, and things just look much nicer in a "nano" form. Unfortunately, if the icon had not been created for that theme, then it remains large and looks funny among the rest.
Today there is brand new app called Shrink. Using shrink you can set a specified percentage of how big you want the icons to be from their original sizes. Once you've chosen your size, simply respiring, and voila. Smaller icons! This app is also compatible with winterboard, iconoclasm, and infinidock.
Shrink is developed by phoenix3200, who has also brought us Music Controls, CalendarPro (Profiles), and Resupported. You can grab Shrink, and his other apps in the Cydia store now.
Shrink runs for $0.99.