Given the difficulties raised by preservation of data as cultural heritage, hearing of the creation of a Second Life Trademark and Patent Office leaves me cold: whether or not it's a reasonable response to a real problem, institutions of intellectual property are should be reflective of a careful balance between the interests of private entities taking advantage of the system and the benefits of the public for whose sake that system exists, and here I'm seeing a heavy emphasis on private interests. Although I haven't ascertained that there isn't a Second Life deposit library...
'Virtual' objects are very much capable of access and preservation (through duplication), so compared to, say, grand achievements of human engineering floating around in Earth orbit, they look like ready targets for archiving. However, those in virtual worlds are commonly either playthings or items of commerce, so maybe they haven't quite the glamour of remnants of scientific and technological endeavour that hang majestically in the vaults above.
I wonder whether virtual worlds can be considered to be or have cultures as the term appears in 'cultural heritage': certainly they have communities. My thought is that a virtual world can both have a heritage (which presumably has to be a product of actual community deeds, rather than part of any artificial history written for the world, unless the latter becomes the former too) and be a complex heritage object or collection of such objects for the 'real' world. That makes me think of 'cultures' versus 'humanity', where an object with value for a certain culture may also be alleged to be part of 'the common heritage of mankind': again an internal/external distinction might apply.
This is the cave labyrinth at Gortys, in Crete's Messara Valley: apparently the Hellenic Speleological Society has an ongoing project of examining, in effect, graffiti. A graffito isn't majestic either, but these have become objects of historical knowledge. Our Gortys probably exists on commercial servers somewhere. That's not automatically a bad thing, but I get nervous sometimes: the difficulty with both graffiti and items in virtual worlds is that at the time of creation they lack any aura of dignity.