Well, AP is less than three months away and since things are getting organized for this year, I'd like to make some suggestions before things are finalized. Hopefully the rest of you will have some suggestions to add too!
The Masquerade/Craftmanship:
1) Please make sure the judges are well experienced with making costumes. I don't believe this was a problem last year, but all too often smaller conventions have rather random judges with little or no experience. There's nothing worse than judges who don't know what they're doing or what they're looking for. Again, I don't think this was a problem last year, but I just wanted to put it out there.
2) Please, please let the cosplayers watch the masq! Last year we were stuck in some little room with almost nothing to occupy us. If we're entering the masq or doing skits, we want to SEE what's going on! If you can't have a section roped off for us (seat the cosplayers in one section first?), at least let us watch it in the green room?
3) Judging people in experience levels makes for a better event. Honestly, it's not fair to judge the brand new cosplayer who has just made their first costume against the kids that have been doing it for years and won various awards already. Most competitions use Novice, Journeyman, and Master, but even two distinctions in level is better than none.
Swimsuit
1) Most importantly, please limit the creepy fanboys who are taking pictures. That was REALLY awkward last year... I know you couldn't do anything about the pool issue, but man...those 'photographers' were all guys and it was a little much. You don't know how young some of those people entering will be so... >_< It's better to just be careful, you know? I know Mike said there shouldn't be such a problem this year, and I thank you for that!
2) Require references--If someone can't show you the swimsuit design they're working from, I would at least have them bring a reference of the character they've changed. If someone's cosplaying a swimsuit version of Utena, have them bring in a picture so you can see what they've done! If they've made a swimsuit from an actual swimsuit the character has, have them bring a pic of that!
3) Have people fill out forms to enter. First of all, you'll have a better idea of who's entering, etc. You can refer to the forms later. Secondly, people can enter in groups, etc. Last year, my friend and I wanted to enter together but weren't able to. I ended up winning something and she didn't

That kinda sucked for her, you know?
I think this is about it... These are just suggestions of course, please use them or don't, but at least consider them! Hopefully if anyone else has suggestions, they'll post them here too! Last year's AP was the last con I've had a lot of fun at, so I want to see if continue to be as awesome as possible! Thanks!