I generally play most of my casino games over at Spin Palace but I switched over to All Slots this week because they've just added loads of new types of games for those of us with Android devices. The only prerequisite is you need to be running a tablet or smartphone with Android 2.2 or after. The new casino games were developed using Adobe Air which is a new format developed by Adobe to enable the development of new games. There is a free Adobe Air app that you may need to download from the Android Market that you may need to install before the games will work. I think it comes pre-installed on newer phones and tablets. Anyway, I think these new games are a big leap forward in terms of graphics and playability. They much closer resemble the more advanced type of casino games that you find online. For instance there is a nice lobby where all the games are laid out once you've logged in. Another plus point is that new games are added to this lobby automatically as soon as they become available. I'm not going to list all the new ones here, but there is the usual roulette, video poker and slots games you would expect and a selection of others you might not.
No, not that I'm aware off. There are currently no real money gambling apps available for Android smartphones.