Double-sided business cards!
One side emphasising your creative & photography skills, with your 'your-name-here' branded website web address emphasised, showcasing your latest & variety of work.
The other side bread & butter, with your 'more-business-like' web address?
I used Deluxe (used to work for them) for my last set, & it's only a few bucks more to print on both sides.
A 'tent card' (such as place name card) gives 4 times the surface area, so you can do 'less-is-more' outside & colour-full info on the inside.
Another option are card-sized mini-CD-ROMS, useful if you do web, programming techy stuff, but less common now.