I just got an iPad and it's probably the ideal way to share photos with people in-person (vs. online). It's also a fantastic digital photo frame when charging or otherwise not in use.
As everyone probably knows or can imagine, it syncs photos through iTunes from either iPhoto, Aperture, or a folder. I've only experimented with the Aperture sync. The iPad has forced me to revisit my smart album naming convention though. Previously, I used this kind of naming convention...
Trips (folder)
- Hawaii -2010 (folder)
- Hawaii - 2010 (project)
- Top Shots (smart album)
It's no problem to sync just your top shots smart albums with the iPad (simply sync selected albums only and check the ones you want to sync), the problem is that iPad will inherit the album's name... in my case "Top Shots"... so when I first synced all my Aperture smart albums to my iPad I ended up with several albums on my iPad called "Top Shots" which wasn't all that helpful.
You have to name your smart albums something more intelligent as you can't rely on the folder structure you have in Aperture to know what's what.