Minnesotagal said:
If one wanted to catch an agent's eye (a reputible agent) would you suggest going to a writer's workshop?
I know of a number of writers who've attended workshops such as Clarion, Viable Paradise, and Odyssey, and still have not yet made a book sale. While I think a good workshop is definitely going to up your skills as a writer, I don't think it will make much of a difference to an agent. Listing a workshop in your letter may catch someone's eye, but a great pitch and a great manuscript is probably the most important thing. (However, this is only my opinion, and I could be wrong.)