do u mean by attach direct from ur forum...
or u want to ask any site which have facility to upload pictures?
if u r searching for site there are many sites
like
megaupload.com
tinypic.com
imageshack.com
--------------- Added [DATE]1316960456[/DATE] at [TIME]1316960456[/TIME] ---------------
or u can give access to users to create there own albums
from there they can upload pictures to their own albums and then can post anywhere in forum...
i hope this is what u asked....