Nexus One's 3.5mm headphone jack accepts standard 3.5mm plug?
Your phone should be fine.

Android won't route phone calls through headphones though, iPhone can be set to do so and uses the phone's microphone.

An option I use to attach standard headphone to my Galaxy S is a simple Bluetooth headphone adapter (£10 from Amazon), that way I get to use MY headphones and make calls via them, plus you can keep your phone in your pocket when skating into town!