I want to build a social site whereby users can upload photos and share and use their profiles on phpbb3 forum.
How can I integrate this with phpbb3 forum?

Im also interested in havin it intergrated in phpbb2 or phpbb3

Regards
EazyOne

Gallery2 and Coppermine both have integration mods.
Unfortunately they're not as beautiful as ZenPhoto.
This script is light, clean, well coded.

It would be great to have an integration mod/tutorial/guide for ZenPhoto and phpBB3. I'm really interested in this too.

is there any developement project to have integration mods?

This would take someone with knowledge of both environments. The current active developers are not likely to be candidates. We both use Zenpage for our CMS.

Just to note that of course phpBB3 actually is a forum and not a CMS. But I agree that we are not candidates as we have no knowledge about that.