Karen -- funny you mention Lobelia. I was just looking up the "blue" [i got them from BlueSprial] have never been able to germinate the "red" ... too bad, i'd love to have some.
I love Scabiosa. I had White one year, and each year after, have not been able to germinate seeds. I had Blue, Yellow, and a Wine color. Zip nadda nothing. and they are so pretty.
as for trades.. i get into group trades. I do a few single trades, but mostly where someone contacts me first. I don't seek out anymore because i can get whatever I need in the big "swaps".
Though i also have a few good friends who i trade with regularly.