The page above is the example Mike uses; I looked for others but couldn’t find them. Mike focuses on the lack of visibility of coupons on Place Pages as a potential deterrent for local businesses to use them to announce offers or deals in this way. Yes, that’s certainly an issue.
I would add to that the challenge of getting these SMBs to serve up this content. Google does need to increase the visibility and prominence of these deals or discounts but it also should make them easy to create.
To that end it might think about incorporating Twitter in one or more of several ways, as Citysearch has done. Better yet Google should think about buying or creating the capability to update once (from Google LBC) and push them out to Facebook and Twitter.
Google just posted about this:
Holding a special event today? Want to post a coupon for 5-7pm tonight? Have a new product in stock? You can now get the word out by posting to your Place Page directly from your Local Business Center dashboard. Once you’ve logged in and are on your business’ dashboard, post an update and it will go live on your Place Page in just a few minutes.
Here’s my more recent and more complete post at SEL about this.