Here is the link for the Dakota County Foreclosure Search:
I am not sure if they are up to date on their filings, so keep in mind, there may be some lagtime between when the paperwork is filed and when the information in on the web. If you want to double check, call the Sheriff's Dept and ask them. Most counties will check it for you in a minute or two over the phone, especially if you tell them you are a tenant. The main number for Dakota County is 651-437-3191 just tell the operator that you are a tenant and you want to talk to the Sheriff's Dept about a Foreclosure Sale.
Also, here are some great resources for renters who are dealing with potential foreclosure:
Home Line is an excellent local resource: http://www.homelinemn.org/hotline/foreclosure/
And the Attorney General has some good general information you might need:
And here is more info from Dakota County:
Minnesota Tenants Union (612) 871-7485 located at: 15 E 22ND St, Minneapolis, MN 55404
I hope that helps. Good luck and don't be shy about calling the Tenant's Union or the Attorney General's Office if you need more help.