For those of you who haven't heard of panzarella orange and lemon
http://johnpanza.googlepages.com/thestoryofthepanzarellaorangeandlemon
and
http://members.fortunecity.com/pjsauber/Panzarella.htm
I have tasted both and am growing them as well, the orange is outstanding, bigger than a grapefruit, very early but very seedy. Seeds don't bother me as I juice my citrus except for mandarins.