I can't seem to get home sharing to work with the iPad? Does it not have this feature?
iOS 4.3 added home sharing functionality to the iPad, but you can only consume iTunes libraries shared by computers that have activated Home Sharing using the same Apple ID and only while iTunes is running. That is, while you can sign in to Home Sharing with an iPad, it doesn't share the iPad's library.
The content is accessed directly from the app where it will be "consumed". For example, in the video app a button in the library screen allows you to access shared library content.
iOS 4.3 introduces the ability to stream content from iTunes 10.2+ on your computer to your iPad, much like the second generation Apple TV.
To enable, go to your iPad Settings app, iPod setting category, and enter your username and password. (the same info you entered in your iTunes Home Sharing setup menus). Also, make sure you're on the same network. Use wifi, not 3G on the iPad.
Then, in your iPod app, the "library" bar should now select which library.
However, I have not succeeded at this last step, despite many screenshots from the developer release showing what it should look like, and iTunes sharing working fine with my Apple TV
To accomplish the last step, simply tap the word library in you iPod app, and a pop up will allow you to select which library to access, including those shared on your home network. To watch videos over the network just go to the Videos app, and you will see a new option in the top labeled Shared. Tap it, and select the library you want access to, and you'll see all the videos available in that library.
You can sync with an Apple TV easily. . . in Photos or in iPod.
Virtually the same process is used to listen to music:
You can have a slide show and music streaming simultaneously. Go to settings and select Photos or iPod to change preferences.