I feel your pain. It's hard not to look back at those games at this point and wonder what could have been. It's especially hard if you JUST miss the playoffs.
As a Skin fan, I can point to: Tampa Bay, Oakland and San Diego as games we had won but blew. Additionally, Denver and KC were very winnable but for our tendancy to make crucial mistakes. Only the Giants beat us handly.
It still looks like a long shot for Washington to get in the post-season. If we can play with this kind of intensity next week we may have a shot ... but we'll need help.