We've been hearing scattered rumors of an 8GB iPhone 3GS for the last couple of weeks. Rogers Wireless has accidentally leaked information about a budget 3GS twice; once on its internal sales list, and once on its website. Both times it came out and denied that there was an 8GB 3GS on the way, citing both of the leaks as simple errors.
I didn't buy that rhetoric then, and I'm sure not going to buy it now. Boy Genius brings us information and a screenshot of a product titled, “IPHN8BLKR 3GS GSM” on the SalesCentral website. They also have inside information from some Rogers employees who claim to have seen several references to 8GB 3GS's over the last couple of weeks.
Rogers isn't going to confirm any of these rumors until the day the 8GB 3GS replaces the current $99 3G, but it's pretty obvious what is going to happen. We're moving towards a new standard for budget smartphones, and once the old 3Gs run out in the US I'm certain we'll see them replaced over here as well.