think i know who A is (Spoilers)
I personally don't think it's going to be ANYONE that we have met so far in the 2 series. It will be a completely different character. Also I doubt it could just be one person due to the constant watchful eye on the Liars and I also doubt it would be a young female due to the help in killing Ian and then having to move his body quickly from the church before the police arrived. Surely it would have to of taken more than one person to move a adult male with dead weight? No?
the person who killed ian might not have even been A, A has connections.
I think it was Garett, who killed Ian, because Ian obviously knew him and was surprised to see him and maybe Ian had something on Garrett and Jenna, so he had to go.
I am glad someone thinks of Maya, because of the same reason DamonElena wrote. Maya had been puzzling since the beginning.
Plus, Maya has pretty eyes :)
-A- has something on Mike. He/she is blackmailing Mike to steal those items (the lamp Jenna made), and plus he is acting all weird and crazy! seems like he has something serious on his shoulder that probably, Aria's life or secrets are at stake and Mike's protecting her.
He acts all weird based on -A-'s instructions
I don't know. Maybe Mike doesn't even know A. Maybe they just want to do something with that thing that Byron's brother was mentally ill. So that Mike gets a bigger part, or a more interesting part in the show.
honestly i think mike might be gay and A knows and is blacking him.
The producers said that Mike isnt A, but i also dont know if i think that Jenna is A either. In one of the flashbacks they saw jennas eyes and they are pretty and when someone goes blind it makes their eyes even more pronounced so it could be her, i also think it was Garret and Jenna that coaxed Jason into hitting her in the head with a shovel, because he cant remember anything and he got that note saying i know what you did, but i think it would be too obvious if it was jenna and garret, i think they did something major involving jason instead of involving allisn. they dont want him to remember anything and jason has said that allison was good at hiding things all over the house and in a flashback allison said that she hides things all over her house and yard.. maybe as in a broken up hockey stick toby found on the very border of the hastings/dilaurentis property line... but i dont think any of the main 4 liars is A, it would be convienient because they could better track information, but noone would make themselves do as much as each girls has been made to by A just to get back at them, because they would go down with them in the end. And maya does make sense especially because of how much shes being targetted but it also just doesnt seem too convincing, especially cause she was sent away to a drug camp
What if the drug camp was all a lie? I'm actually supporting the idea of Maya because she does have very interesting eyes and it's said twice already... first time by the old lady that made the bracelets and the second time on the last episode. But who knows... she's mysterious. And as someone said already the one you less think of it's the one that will be no matter how much obvious it could be :P