If I understand your description correctly, then I believe a very simple php polling server would be enough. You really don't need anything complex here, so just sync the player using a php timestamp and a mysql server if you have one, then you just have to query the db at a preset interval. But if you don't want to work or learn much, then you can just use the free version of smartfox or electroserver, and if you do get a sponsor, switch to the paid version for more connections.

If you want, you might wanna contact http://www.mmocha.com/ . I heard they have as2 api.



But you should seriously consider moving to as3, that way you will get many free apis and great services like adobe's Stratus.