no it depends on how many things you uploaded... if you go into your Control panel (or profile) I think you should be able to manage your attachments?.... edit, no you won't....just checked.
Chris what's the situation with someone's quota when they reach it? do we have to, as admins, go and delete their attachments to free up their quota?
Also, something else that came to my mind is that to save on site space and bandwidth, instead of attaching a pic by uploading it, you can attach it from where it resides in the first place with the command where in between you put the exact file path of an online pic