Write program that checks the date of most recent blog comme

Design a piece of software (either Mac based or web-based) that will allow me to import a list of url's, and it will report back the most recent date of comment. I'll give some example url's, and what the desired response would be: [login to view URL] most recent comment: 8/30/09 [login to view URL] most recent comment: 2/1/10 [login to view URL] 5/26/11 The import file can be either .txt or .csv or .xls, whichever is easiest. I'll be importing several hundred, or sometimes several thousand url's at a time. The results file should probably be in a csv format, and would have two columns - one for the url, and the other column with the most recent comment date. Please contact me with any questions.