I've been playing with my Diana Instant Back+ combined with Fish eye lens. Its size grows hell of a lot more with all the accessories on it, as seen in one of the photos. And if you're wondering that these are crappy pictures, why would anyone want to play with something like that....because it's super fun!! :)
Here's some additional information about the Instant Back+
I'm really bummed right now because I can't find the color gels for the Diana flash. Apparently I've put them somehwere too safe, as usual. This really sucks...