Few things you're overlooking HOOTIE:
- Comparing Nomar and Everett is like comparing apples and oranges. Nomar is liked by nearly everyone, he's coming home, and is a financial draw (endorsements, jerseys). Everett has been a headache everywhere he has been and he moves around far too often to generate some sort of 'name' to the casual fan. The game is about winning, but it doesn't take much to win in the NL West...might as well bring home someone the fans can take a liking to.
- Nomar brings a ton of flexibility to the Dodgers. While they already have some sort of situation with Furcal, Izturis, and Kent, having Nomar gives the Dodgers a few more permutations they can make moves-wise. Garciaparra has said he doesn't care where (on the diamond) he plays.
- While Nomar, as you said, would be an average 1b (Shawn Green-like numbers), you're forgetting that that's actually an upgrade for the Dodgers.
I'm not going to defend the Dodgers' offseason moves (acquiring Furcal is ridiculously superfluous), but I think this is the least faulty of them...trying to justify the Everett signing through this signing isn't a great argument.