I don't think Chrome runs on an iPad.
It's not a normal fault. Clickatell loads fine on an iPhone. Have you tried resetting the iPad or via Settings, Safari. clearing cache
Not sure what you mean by download, do you just mean the page won't display? I've just tried using my iPad 2 and it works fine in Safari & AtomicWeb via 3G and wifi.
But still not working? Maybe the site was just down for a while, just tried again and it displays fine on my iPad, I'm only going to the homepage though, one thing I did notice was that clicking on the Google sponsored link at the top of the results results doesn't work, I had to click on the actual link to Clickatell.com