You should be posting your funny office whiteboard stuff to whiteboardwisdom.
If you’ve never used Flickr, it’s great. You should. They’ll host your photos for free. The innovative thing about Flickr is that if you add a tag (just a name) to a photo and anyone else uses that same tag than a special gallery is available at http://www.flickr.com/photos/tags/tag_name containing all the photos from everyone. Like whiteboardwisdom.
Now go post!