Just a couple of comments since everyone else has already said a lot of what could be said.
First off, I'm very disappointed that all Lois did was get a new dress. Not very imaginative, but then Lois has already got a lot going for her with Clark even if she doesn't know it.
I'm more convinced than ever that Clark is completely aware of what is going on, and for once, is enjoying being the object of desire for a change. Even Clark, at his most lunkheadedness, can't miss the glaring personality flaws in Lana. She's so plastic as to not even be real. I find it amusing given her obvious attractiveness, that Lana could think that Lois is no competition for her. Being blonde only goes so far (and hers probably comes out of a bottle), and all real men find brunettes more attractive anyway.
Since this story is obviously already finished, and there already is a ridiculous amount of comments having been posted... you can go ahead and post the next part.
Tank (who gives Lois credit for actually finding a use for Jimmy)