Primary Areas of Risk
1. Physical Security -- If you lose your iPad and a bad guy finds it, it's game over. There are some ways to protect your data which I will get to shortly. You say "remote wipe." Sure, if it's on and within wireless network range.
2. Malware -- The "first" for iPad was discovered this summer in the Apple app store (I quoted "first" because I find it suspect). In July, Kaspersky found a malicious app in the iOS app stores called "Find and Call." The malicious app uploaded users contacts, then sent each contact an SMS message including a link to download the app.
[5 questions to ask about tablet security]
3. Operating System Vulnerabilities -- Humans make mistakes. These programming mistakes become operating system vulnerabilities which are exploited by threat against (hackers). This summer, Apple released iOS 5.1.1, which addressed three vulnerabilities found in iOS/Safari that allowed a hacker to establish a man-in-the-middle attack. In a man-in-the-middle attack web traffic is intercepted, read and likely save by a third party. The entire time end users (you) have no idea all your traffic is being read and recorded.