I'd heard the rumour previously, but I got confirmation directly from the local post office today - postage stamps will increase to $1 each on the 4th of January.
I rarely post any mail items, so it doesn't really effect me. Even at work I email pretty much everything rather than post it in the mail.
Will this effect you? It will certainly effect some businesses. I imagine a lot of us will also face additional fees if we opt for paper statements (some companies have been charging a fee for a while, I only imagine more will resort to charging a fee).