I actually like your clocks a bit better than a lot of the other ones I scanned around. However, the borders seemed a bit too enclosed around the # time (from my perspective), it felt kind of cramped when in reality there's tons of room on the screen.
Note: I only tried the 2nd and 4th.
Backdrop / Clock itself are great though.
As for the images, I think what you're doing is setting the image as an attachment so it gets shrunken down automatically. Typically when you post images on forums you want to use the img tag as shown below. However, you need to host the pictures off-site (photobucket, imageshack, and a few others).
Code:
[img]www.f.com/Hi.jpg[/img]