Since the release of the Nexus 7 there hasn't been all that many official accessories made available for it and those that have appeared, disappeared just as fast. There is clearly more on the way though as shown off in some leaked documents from Nordic Hardware.
As you may have noticed, there is pogo pins on the side of the Nexus 7. They were always assumed to accommodate a dock and with the leak we're now getting a look at said dock that has a microUSB charging port, a 3.5MM line out jack and is “perfectly-angled for better movie and photo viewing, browsing, and email.” When can you get one? August 24th if the info is accurate for $50.
If you're not really feeling the current case offerings for the Nexus 7, no matter. There is apparently more on the way. A premium leather version of the official Nexus 7 cover is shown to be arriving August 31st for $39.99 in 4 different colors. That's all in addition to more color offerings for the original grey cover. If you want to see more, look below but of course given they are leaked documents, we'll have to wait and see what shows up when.