Motorola Q

Hi. I've never purchased a locked phone before (after having both the p800 and the p900 on t-mobile), and I was just wondering about the kind of third party support that this phone would have. More specifically, will I be able to download programs like AIM, AOL mail or games that are not officially endorsed by verizon? Furthermore, about the pricing on the EV-DO service (which I'm assuming is the only way to access internet on this phone), how much do you think it would cost a month through about average use in terms of AIM (if possible) and E-mail.
Thanks in advance.