"Related question: Since I reached Silver, I acheived 500+ tier points, but switched my accumulation to AA after that. My card is set to expire in Feb, 2004. Will I be sent another Silver card with a 2005 expiration for passing the renewal threshold?[/B]"
If I understand correctly, in Feb 2003 you attained enough points to get silver and your year reset with you as silver and since then you attained enough points to renew silver? If this is the case, then yes, you will receive a new card to last you until Feb 2005.
Dave