Yup, only albums at the moment. I'm still torn about including images. I understand that some people post URLs as text and expect them to turn into images. On the other hand, I'm afraid it could introduce some inconsistencies. For instance, it sidesteps XenForo's proxy. Assuming XenForo can manage permissions related to the use of the IMG tag, that wouldn't be the case here. And it would be rendered using a different HTML code too, making images embedded via Imgur look different from the same image included with the IMG tag.
Ultimately, I think I will end up turning Imgur links into images. But currently I still have reservations and since images already have a BBCode it doesn't seem like a pressing matter, that's why I feel I can take more time to make a better informed decision.