Canon e-mailed a promotion code for 30% off accessories at their online store. i ended up having to call because of a problem with their site and when i spoke with the sales person i asked if i could share the promo code or if it was just for people who received the email. he said it was ok to share!!
so...if you need a "select accessory" and it is being shipped to the US, here's the code...ACC912
the order is supposed to be placed online, (when i couldn't get the page to load, the salesperson happily took my order over the phone). the code is good thru 09/05; quantities are limited. the email also said ground shipping is free on accessory orders over $50, using promo code ACC712.
By the way, the battery for my HF R300 was $90 pre-discount. Best Buy's price for the same battery was $99.99. Canon's discounted price was $37 less than Best buy!!!
Hope this is useful!