Lol, settings>general>network>wifi and to the right of your network name touch the little arrow and choose the static ipaddress option. Ipads a lot happier on static.
Safari YouTube home screen bookmark option works surprisingly well.
Edit: YouTube iPad app should be out soon.
Hope the youtube app comes sooner rather than later.
Seems like the wifi issue is common and will be fixed soon: http://www.idownloadblog.com/2012/09/19/wifi-issues-ios-6/