Can a NAS cause wireless router issues?

Hi! I have a Netgear RangeMax Wireless N Router. I have a 2002 Dell P4 Desktop in my kitchen with a new Netgear USB wireless antenna, a HP laptop and a Moto Droid all accessing the web wirelessly. I have a Mac and a Western Digital NAS hard wired to the router. Lately the Dell and the HP have been sporadically dropping the wireless signal (hard to tell on the Droid). I want to point my finger at the new NAS, but I don’t know enough about it to know if it can cause problems like this. Any thoughts? Thanks!