I thought it was one but believe I read somewhere it was two. Can someone please tell me on how many networked computers can CS3 be installed without conflicts? 
After some hunting I found the EULA.
http://www.adobe.com/products/eulas/index.html
After some hunting I found the EULA.
http://www.adobe.com/products/eulas/index.html
2.4 "Primary User may install a second copy of the Software for his or her exclusive use on either a portable Computer or a Computer located at his or her home, provided that the Software on the portable or home Computer is not used at the same time as the Software on the primary Computer."