Wiki has spawned (and in some cases debunked) many NewAnalogiesForSoftware. This page attempts to pull together some answers to the question why.
DisciplineEnvy has the original WardCunningham "I don't believe it", referring to high falutin' traditional analogies, and his canny proposal of the journalistic analogy to keep us all closer to ExtremeHumility. There follows some useful, early discussion of the issues.
ItsOnlyaMetaphor also takes a slightly different view from this page, concisely emphasising the limitations of metaphors.
From AppropriateWikiTopics (on whether discussion of diets or other such topics are appropriate on Wiki):
My general point is that because software is so intangible it's absolutely right for us to be big on analogies. But the industry desperately needs balance from over-enthusiastic and erroneous application of a few that are so hackneyed that we've even forgotten that they are only analogies. The way forward I'm proposing is to spread the net a lot wider, learn what we can from the combined insights but do the job of assessment and damage limitation in each domain much more thoroughly.
Pushing any analogy to ridiculous extremes to show its limitations normally also has the useful side effect of being very funny. Better a good laugh now than thirty years of pitiful, unfruitful practice to follow. -- RichardDrake
Unconsciously, presumably, a fishing analogy has crept into your statement. "spread the net wider". We can search for new analogies, but half-seriously, I suggest we also observe the metaphors we lapse into. -- CayteLindner
Acute observation of mixed meta-metaphors also has the useful side effect of being very funny. In fact I'm always inclined to explore more than half seriously any analogy that presents itself from 'chance' words. - RichardDrake.
Doesn't mean that Freud was right about that other stuff though. -- BasilFawlty?
See Gareth Morgan's essay on http://www.mgeneral.com/3-now/98-now/110398gm.htm for the importance and utility of metaphor in management. I believe that many of these points carry over to software. His "Images of Organizations" is apparently worth reading too but can be hard going.
I'm kind of metaphor driven, but I can't imagine explaining anything non-trivial without resorting to a metaphor -- PaulHudson
Also see Douglas Hofstadter's FluidConceptsAndCreativeAnalogies for discussions about the utility and limits of analogy.
New analogies? Absolutely. SoftwareIsaNewThing.
Someone once suggested the analogy of MovieMakingAsSoftwareDevelopment?. This is an analogy that stuck for me. Consider some of the attributes: the many people, technologies, project complexity, developed in pieces and then integrated, reviews, cost, schedule, one time work, stays around forever, artistic creation, and probably many other similarities. --MikeBarton