I agree. Using images to track site hits is a typical mobile sites trick, but this is a very interesting application. I wonder if you'll be able to collect a list of IP's of companies; so you can tell if someone from Yahoo! or Google or XYZ has accessed your resume.
>The SQL database behind ipinfodb.com is offered for free. We offer the database in different formats (SQL, CSV), city or country precision, 3 or 4 IP digits precision and data in single or multiple tables. Available information in the database : ISO country code, country name, FIPS region code, region name, city, zipcode, latitude, longitude and GMT/DST timezone. The database is updated during the first week of each month.