I think there's already been talks about that but I missed the thread and can't find it.

 Anyway my previsions are as follow :

Wii : 45%

Xbox360 : 30%

PS3 : 25%

There's been a lot of talk of the Wii gaining over 50% marketshare this year but if you look at the numbers they are sitting at the same marketshare now that they were on January the 1st, 44.2%.

Since January the PS3 has increase its marketshare by little over 1% ( 1.4% I think) and the Xbox360 has lost the corresponding share.

 In that light I don't think my predictions are totally irrealistics.  

Depending on total sales this would put the Xbox360 roughly between 3 and 4 millions units ahead of the PS3 worldwide by the end of the year.

I think your market share prediction is something most people on this site will agree with.

wii has increased share by .5% since beginning of year also, they will increase production soon, so that % will grow faster than .25%/month (3%/year) wii should hit 50% in october and then briefly fall below during holidays as there won't be enough supply to outsell ps3+360 during holidays then by jan/feb it will be back over 50% for good

too much to predict. It really depends on some key issues

PS3: will they have a price cut? Will their AAA games delayed again?

xbox: RRoD issue? price cut? more AAA games that targets xbox audience? (like CoD4)

Wii: Wiifit? production increase?