Are there limits on file size, dimensions, number of attachments? I don't see any info in the ATTACHMENTS thread where Holiday had stated the site is near the storage limit.
The site storage limit was increased, so images can be attached by clicking on the "Attachments and other options" link that is right below and new post window. I will go in and add the file size limits to that other thread, but up to 10 attachments can be added, and the size limit is 1500kb (or 1.5 mb), which allows for a nice hi res image to be uploaded.
To attach: When a new post window is opened, just click on the wording right below the window, in blue, which reads: "Attachments and other options." A menu will then drop down, allowing you to select images from your PC/Mac to add to your post.
Or, as many do, using a 3rd party photo hosting site like Flickr or others is also the option.