Munging the order of your post so that mine may be read.
A little bit gypsy, a little bit rogue, a little bit bard, a little bit illusionist, a little bit tinkerer, a little bit circus-performer and a dash of fey. Nothing at all like Dwarves *or* Halflings.
Wait, no. That
is Halflings, almost to a T. Er, H. Observe:
In the launch of the Scarred Lands setting, Gnomes weren't a part of it, but I wanted to include them, so I envisioned them as a nomadic people called the Rus, who were very much based on cheesy stereotypes of the Romani.
Cool! But, you'll find in the late 3.x artwork, they called these "Halflings". PHB II presents some of this in the affiliations -- just look at that illustration. It's a pretty nice illustration, too
Brightly-painted wagons (that doubled as boats),
garishly-clad entertainers and tinkers and handymen, wandering the roads (and rivers) of the lands. They would sometimes tell stories about their hidden kingdom, which is concealed by such powerful magics that they couldn't even lead others to it (or describe it's location) if they tried.
That's pretty cool, though Birthright halflings had it too -- but yeah, I do see where that's more Gnome than classical Halfling. However, I don't see why it distinctifies the two races, to coin a useless word.
Other times, they would speak of the wandering 'Invisible College' (inspired by the game Divine Right), a magically concealed cart containing an extradimensional space within it, where gnomes went to learn arcane magics, particularly those of illusion, studying from permanant illusions of books, as the real books themselves are stored away in their hidden lands.
Sure. Again, though, the Vistani elements tie it more to 4e Halflings than gnomes. The magic elements are more gnomic, but that's a bit cart-before-the-horse, since halflings could and have eaten the rest of it whole -- a little different, but not
very different, and it's the same little-different above.
The wandering folk would work with animals (to pull their carts), including some surprising beasties, some of whom would join them for their nightly carnival performances, such as dancing bears or trick-performing great cats (although they would be more likely to use dire badgers or wolverines than either of the aforementioned, for traditional reasons).
A great use of gnome's speak-with-animals. Also, something I can see halflings or gnomes doing with equal frequency; points for awesome setting design, but none for niche protection.
That said -- I'm stealing that for my 4e halflings. Thanks!