This is acceptable in principle. But, on principle, I must digress. Actually, I believe Greg has revealed his closet formalist tendencies. Always good to see. You can find the Pet Items while fighting monsters or you can find them for sale from another player; you must pay RF Online Gold. While our conceptualization of virtual worlds may vary from time to time and culture to culture (they are, after all, virtual), the relationships implied by in/on, though sometimes mixed and muddled up just like Lola, are indeed set in the time and space metaphoric stone of our embodiment (without being particularly "situated" in anything else). Wow gold is needed now; we are a world class wow gold store online.

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We know what our buyers need so we offer an instant way of cheap gold wow, the cheapest wow gold delivery. But on World of Warcraft, World of Warcraft Gold can sure make gameplay easier. High damage, potion spamming and area effect is the way to go for grinding Atlantica Gold. Thus, as Greg implies, the use of "on" and "in" indicates a universal (ie, anti-sapir-whorfian and pro-formalist, yay!) mental mechanism, though the objects this mechanism crunches (virtual worlds, for instance) might indeed sway in the fickle breezes of the cultural wikipedia.

See also the discussion in Pinker's Stuff of Thought, which has relevant portions devoted to prepositions and such.