My primary network interface has just become "en0" again, after being "en1" for about 8 years (the time between my first iBook with 802.11b, and getting a MacBo

My primary network interface has just become "en0" again, after being "en1" for about 8 years (the time between my first iBook with 802.11b, and getting a MacBook Air which doesn't have an ethernet port).