What about regular Vinca minor? I have some, but be warned, it's very invasive.
Vinca minor - Wikipedia, the free encyclopedia
And actually, there are varieties of variegated vinca vines that are hardy here in Ct.:
Wayside Gardens: Vinca Illumination PP#12,132 - A variegated Periwinkle (Vinca minor) with blue spring flowers and green-edged yellow foliage; evergreen in the south. (http://www.waysidegardens.com/webapp/wcs/stores/servlet/StoreCatalogDisplay?storeId=10151&catalogId=10151& langId=-1&mainPage=LGprodview&ItemId=41419&PrevMainPage=ga tepage&scChannel=Gate%20ProvenWinners&OfferCode=V3 H - broken link)