Just today have seen some buzz around websockets of HTML 5. After exploring a little, I thought this is sharable so here it is in a small description.
For example : Kaazing supports all major browsers (Firefox version 1.5 and higher, Internet Explorer version 5.5 and higher, Safari version 3.0 and higher, Opera version 9.5 and higher, and Google Chrome version 0.2 and higher).
Where as Pusherapp (widely used by ruby community) doesnt provide support for all browser but provide a flash based fallback solutions for remaining browsers.
Later might come more as I explore more. Or you guys explore before me and update me also 😉 But that sure worth a shot.