I like how Open Cobalt, another virtual world project, allows for the linking of two in-world spaces using 3D window frames, which can swivel from side-to-side, provide live views of whatever’s going on in the opposite end of the window and allow for one to walk an avatar through the window into the other in-world space. It reminds me of what I once told someone when I was logged into SL (I think it had more to do with streaming video than with being able to walk between virtual world areas, though). Example of this method begins below at 0:38.

I wonder, however, if this method of hyperlinking can be embedded into the virtual world’s persistent objects, such as buildings? In fact, just like how originally non-electronic text was eventually imported to the Web and enhanced with context-specific links, the same could be done with 3D copies of real world (and virtual) objects into the virtual world, namely appending links into the objects which link them to the views of other virtual objects; a wiki approach could be used in this process, whereby "redlinks" (or in this case, null spaces) can be linked within these virtual objects in order to allow users to create the new objects in the null spaces.

The problem of appending links to 3D objects is the way that these links should look embedded within the objects without any visually disturbances. If frames are going to be one of the main presentational means of linking one object to another, then it would have to maintain a color or design scheme that is distinguishable from the rest of the object but not too distinguishable. It would also need a means of navigation that makes frames easily responsive to the mouse pointer, no matter how visually skewed the linked portion looks from the rest of the object.

"Hyperframes" could also be a major boost to the usage of "tabbed traveling" or "tabbed teleportation" in virtual worlds, since they would be middle-clickable to allow for a new tab of a new space to be visited non-linearly.