"Taboo" is a registered trademark. You're probably legally in the clear to describe your game as "Taboo-like", but if your app becomes at all popular, you're likely to get a C&D if not outright sued for using the term "Taboo" so freely throughout your app.
Looks nice, but I think you should put a description of what Taboo is exactly. I don't know whether it's a well-known US game but as a Brit I've never heard of it and I'm still not enlightened as to exactly what the game is! I'll google it and probably download the app shortly.
Unmentionables gives Taboo a 21st century makeover. Marathon Mode, in app purchases that are a lot cheaper than Taboo, and something you can take anywhere you go. I'm an iPhone developer, but did the designs myself, so feedback on that would be helpful too.<p>It's available for download at: <a href="http://bit.ly/unmentionables" rel="nofollow">http://bit.ly/unmentionables</a>
I like it. I especially appreciate that you have a free play mode. I think this could be good for road trips. Smart to have the free cards as a motivation to allow push notifications. The idea of user submitted cards is kinda neat too.
Your copyright notice is in a weird spot in Chrome. Here's what I see: <a href="http://i.imgur.com/LfQEB.png" rel="nofollow">http://i.imgur.com/LfQEB.png</a>