i joined Zanni on the 7th of january '08, but i'd known about it and been contemplating fora few week before hand. So i like to think of myself as an '07 user XD
i dunno, that's just the date that sprung to mind when you said April. msut have seen your join date somewhere, and remembered it slightly wrong.
technically I've been involved in the whole avatar site thing since '06 some time. My sister was obsessed with Gaia, and i had an account to please her.