I don't think you need to be a newcomer in order to be confused. People got fed up of fancy naming conventions when newer cards came out, that simply did not deliver..look at the Geforce 4 Ti vs. Geforce FX fiasco, to name but one example. Why not just put "LE" at the end of a card's name to signify it's a light edition? At least then the user knows such a card is aimed at HTPC or basic office/home use, so that user knows what to expect: features rather than performance. Just look at the list Homgerdog kindly supplied..who has the time to sit down and meticulously go through these cards in order to draw effective comparisons? Unless you deal with them all the time it's in one ear out the other, especially considering how fast the market changes these days.
Don't get me wrong..I like a variety of products to choose from and I never really had many issues with the drivers on nVidia products, but the naming convention has caught me out a couple of times and I have wasted money on cards I would have otherwise dropped like a stone considering they were bought on a false pretext of offering more performance than the previous generation.
To the avid user, terms like universal shaders and memory bandwidth is second nature but to the novice this vast array of different specifications must truly be bewildering.