Go for it! You may still be technically married, but you are in the process of divorce. I looked at your past questions, and you even had a restraining order against your ex? Don't let him stop you from living your life! Who cares if the state still considers you married if you are not living with, talking to, or otherwise having any kind of contact with your 'husband'. It's temporary anyway at this point. Take it slow, and keep it casual. Have fun!
Although, my biggest thing would be to make sure you are still prioritizing your kids... Also, be honest with any guy you DO date about your priorities and the fact that you are still legally married. Just make it clear that you have been out of the relationship long-term, and that you are in the process of divorcing.