Our grade 3 students are currently doing a unit in Art where they will do an exhibition for parents at the end which will include QR codes linking to process work and video reflections.
I took a look at apps available for blogging on the iPad with Zapd and Posterous looking quite promising. However, since our school uses the Google Apps Suite of products for education, it was easier just to create class accounts for Picasa so that students could upload photos and videos of their process work directly to Picasa albums and then create QR Codes to link to these albums.
To get started, you will need to have an Google Account linked to Picasa and an app called Web Albums ($2.99). This is one of the best apps available to easily upload multiple images and videos directly from your iPad to services such as Picasa and Facebook. You will also need an app to help you create a QR code. There are a variety of apps to choose from but I settled on one called Qrafter which lets you both scan and create QR codes. There is a free version available but you will need to upgrade to the paid version ($2.99) if you want to be able to create your own QR codes.
Below is a simple tutorial I put together for teachers and parents using an app called Strip Designer ($2.99). Although this was designed specifically for our accounts, it should be easy for anyone to follow.