Use this link
, refresh it regularly, buy it as fast as you can when it is in stock, then sit back and profit.
Otherwise, check out any of the Epson P-XXXX listings on eBay. They are great for storing, backing-up and photo viewing.
Or, if you already have a tablet, most of those work great. Especially if you have access to expandable storage, either from (Micro)SD cards or attached hard drives. Any Android with Honeycomb or, even better, Ice Cream Sandwhich will work very well as a photo backup and viewing device. If you go iPad, get the most memory you can afford from the get-go. For augmenting iPad storage, a few options exist like the HyperDrive (get the UDMA model). But I think that method is cumbersome, YMMV.