7eleven SpeakOut Wireless currently offers unlimited browsing via the rogers goam.com APN for $7 per month. I have tethered this from my old Motorola MPX220 to my n800 and my laptop.

The only catch is that everything has to go through a http proxy - fine for most browsing though. (no voip/im people!)

The best part about this deal is that SpeakOut credit lasts 365 days - so if you travel to Canada a few times a year, you can activate and deactivate the internet as required - a $25 recharge would cover you for 3x30 day blocks spread over a year.

I never so much as saw a contract or any terms of use or anything (for the phone or the internet) - i just rang up and literally said "can I disconnect the browsing service at anytime" she said "yes, do you want me to set it up for you", I said "yes" she said "restart your phone in 15 minutes".

My speed is limited because the MPX220 is only gprs, but apparently the goam.com APN supports full 3G speed according to howardforums.

EDIT: they may be increasing it to $10 next year - still a bargain in my books