Pretty much everyone has a Blackberry or an iPhone these days. After a little search on Google, I couldn't find many information security applications for these devices. There is MiniStumbler, but pretty much all the other apps are for securing the smart phone itself.
So, what security-related application would you like on a smart phone? A sniffer, port scanner, WEP cracking tool, an IDS, a "netcat-like" tool? They would obviously be less powerful then their stand alone counterpart, but I wouldn't mind some of these tools on my Blackberry...
Let me know what you think!