I keep a lookout for images linked on other servers and will generally copy them to ECN and edit the post as appropriate if it appears to be something we would want to keep for posterity (just done that with Texas-Ranger's posts in non-U.S.). For me, I find that's actually less work than copying the photos from an e-mail, clipping out the appropriate quotes to post, and then trying to decide a topic title.
What I would ask though is to please keep the image widths down whenever possible. A lot of people are still using 800-pixel wide screen settings (myself included), and large images result in very awkward horizontal scrolling to read the text.
Where detail needs to be shown, it's better to post a reduced-size version and include a link to the larger image.
