Socrates has the leaderboard as well as two in post positions that you can setup in the Socrates layout page. Your best bet is to put the code block in there. That way you don't need to manually insert them in each post. The leaderboard also can convert better since Adsense will put up the nicer graphical ads there much of the time.
If you are using version 2.0 or higher in the layout section of Socrates, there is a spot for adsense blocks in the post. Your text will wrap nicely around the content. Much easier than any adsense plugin, in my opinion.
Recommended to use 336x280 or 300x250 blocks. The ads will appear within the body of your posts. Leave a box blank to disable the ad.
There are still a few header related bugs in the Beta that is posted. It can be addressed by tweaking some PHP code. At this point if you're not in a hurry, I would wait until tomorrow. Dan has posted that the final version of 2.0 will be released sometime tomorrow.
Google Ads just started to work. I had my main topic as a page rather than a post and my privacy, terms & conditions, etc. as posts. Switched these around based on another thread in the forum with my main topic as a post, it works like a champ.