SuaveGrass

Check out Suave by ~thyraz [link] it's a great theme that is growing a solid following [link] online. This download is a mod pack for Suave, it has a modded wallpaper that adds the subtle "hatching" motif in the icon template and few modded icons (mostly by others) including updated WeatherIcon backgrounds. The screen shot here shows the final look with these minor mods in place. Just unzip the archive, place it in your /Themes directory, and apply with Winterboard on any jailbroken iPhone.

UPDATE #1: I added all the Calendar.png month icons (and the PSD file), still no automated way to swap them in. Let me know.

UPDATE #2: See the new Alts folder for an optional "dots" theme and some new icons (again, not mine, just mods formatted with the theme template).