My prediction - the next general election will be the end of July
The rainbow coalition deal is really a non starter. The fact we are even thinking about it is more a product of the fact Nick Clegg doesn't command the support of his MPs and party than any form of logic.
My guess is that we are still heading for minority Conservative government. It will present a budget in the first 50 days which it will fail to get through Parliament, as Nick Clegg won't be able to control his weirdie beardie wing.
And a new general election will be called.
Expect to be back at the polling station around then end of July. As the Lib Dems are incapable of delivering stable government or government of any sort.