It's hard to tell whether Montego Bay began life as Emigre's Matrix (or Matrix Tall) and was modified to be more conventional, or whether someone took an existing condensed serif and added the signature Matrix serif treatment.
My thought was something Matrix-ish as well. I found Latin MT Condensed which is pretty close except for the 'g'. As for 'Jamaica' I just have the ugly jpg placed in my layout... I'll pick up the search again tomorrow.