Does the late '09 24" iMac minidisplay port allow for video input as well as output?

Greetings,

I own a 24" 2.66 GHz Intel Core 2 Duo iMac with the Nvidia 9400 card. It's nearing the end of it's gaming life but I still want to use it for everything else after I get my new tower. Everything I can find in reguards to using an iMac as a monitor for a different computer references the 27" iMac one model newer than my current computer. Is the minidisplay port on my machine able to accept an input or am I forced to get a subpar monitor for my 2nd machine? Thanks!

~Dan