Arduino Microcontroller Relay Control Projects

http://futurlec.com/Relay_4.shtml

In expensive TTL control of high amp relays

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&productId=1860070&catalogId=10001&freeText=1860070&app.products.maxperpage=15&storeId=10001&search_type=jamecoall&ddkey=https:OrderItemAdd

5V 10mA control... could be directly connected to arduino?  Not sure about potential inductive load.

http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_187151_-1

Similar but higher draw.  Maybe transistor controlled?

http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go&lang=en&site=us&keywords=306-1250-ND&x=0&y=0

This is what I settled on.

306-1250-ND