Skeptics were certainly rampant during AT&T's release of its Mark the Spot app back in 2009.  However, according to TUAW, it appears the company might actually be following up on claims from users of the app in efforts to improve service.

Some reports coming in are saying that some have received unexpected free text messages from AT&T, alerting them about improvements in network coverage that are directly linked to feedback about poor coverage.  Here's an example of one of the messages:

AT&T Free Msg: AT&T appreciates your Mark the Spot feedback from Nevada City CA on 12/24/2009.  We are pleased to inform you that we have a new cell site planned near your submission in the next 60-90 days.  If you have any further comments or feedback, you may reply to this msg for free.  Thank you, AT&T.

TUAW also got a response from AT&T's PR about the reports from the Mark the Spot app.

"AT&T's network team uses the data to address the issues that can be immediately resolved, optimize coverage and capacity needs, and plan for future network investment.  Combined with other data we get continually, this customer feedback is supporting our efforts to maintain and enhance our wireless network.  To date, the feedback provided by customers using the app has already contributed to AT&T's short and long-term network planning."

To date, AT&T's app has been downloaded one million times plus, according to the company.  The app also allows one to recommend businesses for AT&T Wi-Fi hotspot consideration.