Not attached to email, however one can attach a picture in your picture viewer, by opening the picture, and then clicking ond Send as MMS or or send to Messenger Contact (if you have BB Messenger loaded).
I have the Pearl and though it gives me the option to send attachments, it doesn't work. I can't originate a message on my Pearl with an attachment - it fails. I can receive and forward email with an attachment just fine though. I can also originate an email without an attachment from the Pearl.
With the 7100 I believe you can send a picture using BBMessenger.
what email service are you using? I can send picture attachments with Gmail and, now that my IS dept upgraded the BES, I can now send them from my BES mail account too. I've always been able to send them from GMail, though.