Canada Post and the US Postal Service raised their postage rates again in January 2013. I was busy then, but I’ve grabbed a moment and updated my handy Canada Post and USPS postage rate quick reference card. The Canada Post rate increases were effective January 14, 2013, and the USPS increases were effective January 27.
My Canada Post and USPS Postage Rates project page, http://jdlh.com/en/pr/postage_card.html, has links to download the latest charts as I update them. The spreadsheet source file for the charts is also there. Both are licensed CC-BY-SA, so please feel free to re-use and modify them (as long as you attribute my work and share your product as freely).
Heads up: Canada Post has already received approval for first-class mail rate increases in 2014. The 2013 increases of both agencies came almost exactly one year after their 2012 increases, so I won’t be surprised if this becomes an annual event. The good news is that both Canada Post and USPS offer “perpetual” or “forever” stamps, which are worth first-class basic domestic postage, whatever the price may increase to.