I have been hearing that the FY 2010 Defence Appropriation Bil is being currently discuss in the US Senate which is said to be containing the proposal for lift of ban on F-22 Raptor in which the Janpanese, Australian, Israeli and South Korean have deep interest. Anyone knows more detail information on the current senate discussion?
There's no "deep interest" on Australia's behalf for the F-22. There have been some concentrated attempts on behalf of certain individuals to promote the Raptor as "right for Australia", and a woefully ill-informed media latches on to this from time to time.
The RAAF does not share this view. Nor did the previous government, and nor does the current government as far as I know, beyond some political maneuvering on the part of the ex-Defence Minister - which seemed to be based not on an understanding of capability but instead on media points-scoring while his political party was in opposition. This same Minister then resigned after a series of goings-on ranging from inappropriate to downright corrupt.
So yes, what interest Australia has in the F-22 has been blown out of all proportion, just so you know.
As far as the other countries mentioned, I really can't speculate, but I very much doubt you'll be seeing an export Raptor any time soon. The costs involved in developing an "export" variant would be extremely high, and the Raptor is, in USAF service, suffering from serious through-life issues that I suspect would make any air force very cautious about operating the platform. If it's enough to give the USAF a headache, you can imagine how much of an all-out disaster it could turn into for smaller, less well-funded air forces.
Even if L-M were to get the okay to market an export variant, it would be totally unaffordable to the majority of potential customers. Limited users means a limited production run, and that combined with the development costs associated with creating an export variant would mean the per-unit cost would be extremely daunting.
I think we've seen the last of the F-22. From what I know, the US fighter market in the next decade is going to be F-35s, Super Hornets, advanced F-16 derivatives and possibly Silent Eagle - and even that last one isn't looking very likely.