I have to laugh about the fanboys here... Having a user defined option for the thumbnail is just another field that has to be added to the database. If it's populated, tell the software to use that field, if it's empty, use the standard field that is populated by the algorithm. Any IT developer worth his salt can add that feature in half a day. This is not some Google-type complex machine-learning stuff, this is just totally basic and it is ridiculous that it hasn't been an option from day one or implemented in the meantime. This thread was started in July 2011 and we now have almost 2014. Has Evernote ever heard of agile software development??? Something smells here...