Thanx to Mr.Slate for the german tutorial, I'm just translating it.
You can upload pictures easy here: freesoft-board.to - we host your Files - 8 MB Upload 4 free - kostenloses File hosting
Just click on the link to see the thumbnail and after clicking on it again you've got the picture with the address in your browser.
Copy this address and then click on picture-symbol
in the post editor. Past the link to the image there and so easily you've got it shown in the post.Please take care of making the pictures not too big!
Best regards
xlemmingx