The Vaadwaur are perhaps my favorite <i>Voyager</i> "villain race" next to the Kazon.
I have dozens of pages of notes concerning a <i>Voyager</i>-esque Series, ranging from single vessels lost in the Delta Quadrant to trading convoys to military armadas (Klingons, Romulan, Cardassian, etc.).
Among my favorite Series that I developed and played was the "Starfleet cadets lost in the Delta Quadrant" one where they are aided by Gegen, the Voth scientists that was convicted of heresy against Doctrine and stripped of his prestige and his position and relgated to metalurgical studies.
The PCs - there were six or seven (depending on the week) - were caught in a spatial anomaly and tossed into the Delta Quadrant with no obvious means of returning home and with little in the way of technology (other than their training vessels). Gegen provided them with a new ship, some equipment, and a large chunk of <i>Voyager's</i> database (which he'd downloaded several years earlier).
This provided the PCs with limited (but useable) resources, including a copy of the <i>Voyager</i> EMH! This was the longest-lived Series that I GM'd, lasting over two years.
Besides that one, I do have a whole binder full of other <i>Voyager</i>-related ideas, some involving Starfleet and other Federation personnel, some involving other AQ & BQ races. and some involving the Founders and their ilk.
Among my other favorite scenarios is the stabilization of the Barzan wormhole by an alien group (I was considering the Think Tank), allowing two-way travel between Federation space and the Delta Quadrant. This setup was meant to allow DQ races and technologies (as well as <i>Voyager</i> follow-up story arcs) to find their way to the Alpha Quadrant without quantum slipstream or transwarp technologies.
Yet another of my personal favorites is the Federation Merchant Marine vessel that stumbles across the Vaadwaur subspace corridoor network and finds itself plopped down in Kazon territory. Needless to say, Maje Culluh and his half-Cardassian son (along with the rest of the crumbling Kazon-Nistrim sect) show up and wackiness ensues. This Series almost certainly includes the Trabe and perhaps even the Talaxians.
Still another Series seed revolves around a Dominion ship loaded with Jem'Hadar soldiers, Cardassian military personnel, a detachment of Son'a advisors (who know the secret of producing Ketracel-White) and a Vorta commander that is transported to the Delta Quadrant near where the Caretaker's array was previously located when an exchange of weapons fire tore a hole in subspace and their heavily-damaged ship fell through it and into Ocampa space. The Ocampa subterranean city complex has been completely drained of power and sealed from outsiders, but the Dominion transporters allow access. They find the Ocampa are all gone without a trace, as are the Kazon that had previously littered the planet's surface.
Unable to repair their ship, they manage to land (read as crash) it onto the surface, and then set about cannibalizing it for parts that they then use to power the Ocampa city. Stuck in the Delta Quadrant, the Cardassian and Son'a crew members resign themselves to a new life, though the Vorta and Jem'Hadar spend much of their time trying to figure out a way to escape and return to continue the fight for the Dominion and their Founder masters.
A final idea (for the moment) revolves around the Vaadwaur traveling to the Badlands and discovering former Maquis strongholds (full of weapons and even a couple of small ships). Settling on one of the few "hospitable" planetoids in the region, the Vaadwaur leadership begins rebuilding their empire, planning on using the corridoors to investigate the region, acquire new technologies (including cloaking devices), and making themselves into a new power to be reckoned with.
Given the great power that the subspace corridoors offer, I was also thinking that a contingent of Vaadwaur (a semi-saurian species, like the Cardassians) might travel to Cardassia Prime - a world, like their own, destroyed by their enemies - and offer an alliance, offering knowledge of and access to the subspace network in exchange for ships, technology, and so on. Such a union would certainly lead to headaches for the Federation, the Klingons and the Romulans, especially if the deal was between the Vaadwaur and the remnants of the Obsidian Order.
So anyway, that's just a few drops from the <i>Voyager</i> well. Take them as you will.
mactavish out.
Our country's past progress has been the result, not of the mass mind applying average intelligence to the problems of the day, but of the brilliance and dedication of wise individuals who applied their wisdom to advance the freedom and the material well-being of all of our people.
-Conscience of a Conservative, Barry Goldwater