Will there be an Ipad portal for images and amateur movies?

Not sure what you mean by portal. You can import pics and videos using the camera connection kit.

Using The iPad Camera Connection Kit

http://support.apple.com/kb/HT4101

Pad2, the new iPad Supported Video Formats & Movie Formats

• H.264 video up to 1080p, 30 frames per second, High Profile level 4.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
• MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
• Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format

 Cheers, Tom 😉

There doesn't need to be any special sites just for iPads, they can upload to the same sites you can upload to using a Windows computer or a Mac. From an iPad or iPhone you can directly upload pictures to facebook and twitter and videos to YouTube, and also upload to any other sites that accept uploads by email or have their own submission app like Vimeo.