Clean Design Continued

I found a link to some very clean designs for business cards. The changes in the design are always subtle, like a change in color. There's also some very neat background designs.  Here's a few that I liked best:

http://cardobserver.com/gallery/fuse
http://cardobserver.com/gallery/elemental-architecture

I was thinking of using an all-white background like many of these. I also like the use of line in Jacob Ward's business card. I like the use of weight at the bottom, there's a great deal of space and the eye settles comfortably at the bottom. I'm going to think about this as I design, since I'm struggling a bit with spatial cues.