I'm not sure what you mean about streaming. I stream many videos and audios on my Ipad 1 all the time. I also use Air Play to stream those via Apple TV to TV. Maybe you can add a bit more about what you want from streaming.
I am thrilled about not having to connect to PC for upgrades anymore. I always had very very long backups prior and had to delete some apps like news where there was a lot of content to get reasonble times for upgrades. I guese judt this one more time to get IOS 5 LOL.
My understanding is that Adobe is doing some rethinking but HTML5 is available now. Any of the sites that use Flash can switch but that's up to the site developer. For instance Vimeo completely switched from Flash to HTML5 and many of the photography sites I visit have redone their sites to use HTML5 instead of Flash and i can stream any of those. So--for your soccer matches I'm not sure.
Thought I would add this link for those interested in the Flash issue on IOS devices and what Adobe's response is with their new Flash server.
Adobe finally brings Flash to iPhone and iPad