I love simple web tools like this one that has extreme functional value!
Enter PlaceHold.it!
You can easily create image placeholders by simply adding the dimensions on the end of the PlaceHold.it’s URL!
For example…
I’ve created a few here embedded into this post:
Neat, huh?
Here’s a screenshot of the code:

[HT: NewsFTW]

very cool
i like it.
This is neat.
i agree. i’m going to start using it.
newsftw needs to work on their standardtheme customization.
hahahah.
I made my own … http://thepuredesign.com/img/300×300 ( put in any two dimensions )
dude. you’re so awesome!
I’ve been looking for something like this when designing websites, now I have the tool.
word!