Gabriela,
I agree with you. I think a list of websites where plant species are described would be useful. I certainly do not have reference books to check on all the plant IDs of species which I send in. I tend to rely on the name under which I bought/was given the plant. I usually do a google search for photos and if it looks right, that's the name I stick with. I suspect it is the same for most members. And of course, just putting sp after the name allows for the plants I'm not sure of.
In any case, I hope everyone is busy collecting seeds to make this year's exchange even bigger and better than before.