Here is the site I use for all my pic storage. Most forums don't have the capacity to store photos and therefore have a need for a picture hosting site like "flicr" or "photobucket". I find these sites to have too many restrictions and quantity limitions. When many photos in older posts on these forums don't show up, it's because the account owner had to delete older photos to make room in their account for newer photos, affectively making those older posts useless!
This has never been an issue at Hub garage! I have thousands (approx.10,000 I think) stored there and have never been asked to slow down or delete older pics, It's truly unlimited!!! Your pics can be organized very easily making it a simple task when tracking down that certain pic needed for explaining a tech post or simply showing off!!!
The site itself is mostly invovling the posting of and commenting on pics of auto related content - there is no instant messenging or forum style chat, but there are notes that everyone can veiw or a PM system for private member to member communication.