I have blogged about choosing attendants before (read here), but I just want to share that with the newly engaged.
Choosing Your Attendants
Your attendants do a lot more than just stand next to you on the day of the wedding, now is the time to get them involved. You may opt to have 0 attendants at all, especially if you're having a casual event, most choose between 2 and 12 members of the bridal party.
Look over these lists of responsibilities for bridesmaids and groomsmen before you make your final choices. If they live nearby, its nice to ask someone in person, but a phone call is fine for those who live far away.
Now get to plannin'