I wouldn't want to be Clegg. He finds himself wielding power with no mandate for it, which tends to slaughter his own sacred cows of electoral reform. If he chooses to prop up the Tories with just over a third of the vote, not only would the same principle be compromised, but he'd forever taint the Libdems as closet rightwingers who helped the hated Tories gain power after gaining tactical votes from those who wanted to keep them out.
If he worked with Labour, the democratic principle is once again compromised, but at least his progressive credentials remain intact, and he retains the possibility of future support from progressives. This might be his better option of the two, siince he could reasonably claim that the progressive vote outweighed the Conservative one, and that's what shaped his decision.
Realistically, he might be better refusing to work with either side. Whichever side he props up has no mandate, and he'll share in their fragility and in all likelihood get the public order of the boot next time around, along with the losing side he assisted."
good work that poster. think i need a lay down