On June 7, 2012 at 16:29, Fins said...
I can't from an iPhone
You have a lot to learn :-)
If you press and hold on the image you will be presented with 2 choices:
Save Image - will save the image to your photo app
Copy - will copy the URL of the image to the clipboard which can then be pasted pretty much anywhere within the iPhone where a text cursor appears...double tap to choose to paste what is in the clipboard
...just in case you're wondering in the future...