I don't know much about philosophy, but I know that Less Wrong's opinion of it is pretty low [3].

Eliezer probably talks about quantum mechanics more than most philosophers, so his recent explanation [4] of how statements about day-to-day objects can be true despite the fact that only fundamental particles really exist is probably original.

[3] http://lesswrong.com/lw/frp/train_philosophers_with_pearl_an...

[4] http://lesswrong.com/lw/frz/mixed_reference_the_great_reduct...