Touch IR+ will release a native iPad app sometime after the iPhone 4.0 OS is released. Touch IR+ can do network-based IR and much, much more. Several users are already using the current app on the iPad. $4.99 for the iPhon/iPod Touch app.
App Store: [Link: itunes.apple.com]
Web Site (PC Software and support):
http://touch-ir.webs.com