Tired of waiting for the image to post to VMware's website? .. me too ... grab it here until it officially posts to the web, then I'll take this link down.
Enjoy. VIC drivers integrated in the image.
I just downloaded it successfully. Could have been any # of things causing your error. I would try it again and if it still doesn't work we will find something that does.
Your Friendly Neighborhood Community Manager
I figured out (the hard way after tweeting and posting here) that Dropbox only allows 20GB of daily downloads. After you reach that limit, it shuts down public links on your account for 3 days. If you try again, it should be open again.
They are telling us that it will be posted *soon* on VMware's website. The exact same image I have posted to the drop box account.
The official image has been posted to VMware's website. Download it here -> https://my.vmware.com/web/vmware/details?downloadGroup=CISCO-ESXI-5.1.0-GA-25SEP2012&productId=285#product_downloads
Now I can get back to using my DropBox bandwidth for my *secret* projects :-)
Here's the link for those looking - https://my.vmware.com/web/vmware/details?downloadGroup=CISCO-ESXI-5.1.0U1-MAY2013&productId=284