Yea! After days and days of frustration, I finally got iTunes Home Sharing to work on my iPad Mini.
It seems as though everybody's situation is different as far as what it takes to get iTunes Home Sharing to fully work. This is what finally worked for me.
Problem:
iPad Mini cannot see my Home Sharing library, so I can't stream content via WiFi. It seems to *find* the library, but it just sits-and-spins and never loads anything. Every other device in the network operates fine, just as expected.
Some Background:
Network Devices: PC with Win 7 64-bit, PC with XP Pro, Samsung Laptop Win 7, AppleTV2, AppleTV3, iPad Mini
Router: Dlink DIR-655
Firewall: Zonealarm Free
Very large library (e.g. > 100,000 songs)
Things I tried that didn't work:
1. Router firmware updated, router settings (port forwarding, multicast enabling, wpa vs wpa2, etc, etc, etc)
2. Zonealarm turned off and uninstalled, used Windows built in firewall
3. Disabled IPv6
4. Updated iTunes to 11.1
5. Updated iPad Mini to iOS 7
6. A whole host of other things that worked for other people mentioned in threads like this one
What ACTUALLY worked for me:
On my main PC (Win 7 64-bit), turning on Home Media Streaming in Windows Media Player
Soon after I did that, the iPad Mini not only finds the Home Sharing library, but ACTUALLY LOADS IT within a few seconds. I don't know why it works, just that it does. Perhaps some switch buried deep in the OS that I had overlooked got thrown by turning this on. Bottom line is that it works now.
I tried a bunch of things that worked for other people, but this is what finally worked for me. Of course, YMMV.