Cable operator Mediacom dropped the news earlier this month during their second quarter conference call that they'd be raising customer speeds in September. True to their word, the operator tells the Des Moines Register that as of tomorrow, they're on schedule to bump the company's 8Mbps tier to 12Mbps downstream with 1Mbps upstream. The company's 10Mbps tier will be boosted to 15Mbps downstream and 1Mbps upstream. According to Mediacom, this is the fourth time they've bumped speeds since 2005, though the 15-20 Mbps maximum speeds fall short of the top speeds being provided by cable operators who've been upgrading their infrastructure to DOCSIS 3.0 technology. The 1Mbps upstream for a higher end product offering is also starting to show its age.