Google has a webmaster support section here https://support.google.com/webmasters/answer/35843?hl=en all about filing a reconsideration request.
The “Request reconsideration of your site” section used to link to the google request reconsideration form but no longer exits.
You are now redirected to a drop down of all the sites you have in webmaster tools which then directly links to the new manual actions option which we discussed here http://www.threadwatch.org/node/20630
Dave Naylor also spotted here too http://www.davidnaylor.co.uk/reconsideration-request-for-google-updates.html
I’ve seen a few people asking about hacked/compromised sites or banned sites wanting to file a reconsideration request but can’t find the form.
So have we lost the form forever?