I said a long long time ago a hung or balanced parliament is the only outcome of the 6th. I have also repeatedly said that whatever happens on the day Brown will not be the PM 12 weeks after the election.
So I will expand a bit further on likely IMHO scenarios:
Labour win a majority which is workable by cosying up to the nationalist parties and the likes of UKIP/Greens. Instant coup against Brown as he should have led them to outright victory. This will result in a new election within months, as people will see that the mob who presided over the crunch, who have had an emergency budget within 50 days of the election with BIG hits on tax and jobs, are still in office and unable to come good on promises of further devolution/wind farms. This causes collapse and a new ballot.
The same as above with the Tories without the coup. They will survive a bit longer because they will have the 'look at the bag of sh!te we have inherited' defence. The infighting which Cameron has played down will erupt as Farage demands something probably quite trivial and the euro huggers and haters in blue slug it out. Election by Christmas.
A Lib/Lab pact will not have Brown at the helm. What it will have is Clegg holding probably Alan Johnson to ransom over Proportional Representation. Johnson refusing, Clegg calls for a vote of confidence, and that leads to a new election.
A Lib/Con pact will be much the same although I don't think it is very likely. Clegg the ex MEP and Europhile will go down like a cup of cold sick with the powerful Eurosceptics in blue.
At this moment in time the best we can hope for is a Lib/Lab coalition. Cable in as Chancellor with Balls as his 2IC. Brown out on his ear, Johnson in, but do not for one minute count out Harman as the next PM.
Clegg will get a high up such as Foreign or a recreated ODPM (the old Prescott job), possibly tasked with electoral reform. Huhne will get defence. Mandelson will need to get frozen out or he will cause havoc.
The Libs will want one maybe two more cabinet posts as they don't really have the big hitters. David Laws will shoe in to the Treasury with his background but that may be at the cost of Balls (as long as he doesn't get Portillo'ed). If Labour will not move on the Balls back in the treasury issue (fairly likely) Laws could well be offered Justice or my feeling is Health. Sarah Teather could do a job of work for Education.
The only other thing would be if the current speaker didn't stay, I would have an outside bob on Simon Hughes or Lorelei Burt.
Now I must apologise, as I promised that in the run up to the election, I wouldn't do yet another long winded political commentary. Perhaps that is why I should stand for parliament. A record of broken promises and an ability to spout forth meaningless hot air????
Jimps