SuZamme,
Did the 510 cartridges you bought come with the Fluval filler? The best price I've found for new empty cartridges is strictlyejuice but they don't say what the filler is. I remember reading good things about Fluval filler. Can you point me to a site that has empty 510 cartridges with Fluval filler?
Miller325,
The Fluval filler you can get from any pet store that sells stuff for fish aquariums. It's cheap and a box will last you almost forever because you peel it apart and use a "slab" that is only the thickness of a cart. If you get some, PM me and I will give you my triangle size piece details.
None of the cart I have ever seen come with this. They do have a poly filler that will work for a few days, you can wash it out and dry it, and then eventually you will want to change it out completely when you get your Fluval.
As far as juice goes, check out the ECF classifieds and you can get a huge variety of juice to try from different suppliers. I think someone has like 151 different little sample bottles for sale right now.
I found the listing for you:
http://www.e-cigarette-forum.com/forum/classifieds-swaps/143929-151-bottles-juice-wall.html
You're right about wanting the tobacco flavors to start...that will last about 2 days until you get it that you can vape ANY flavor you favor. Hurrah!!!!