A couple Questions

[ExiledOne]

I think some of the achievements I've done have gear (at least one had a picture of pants when it popped up notifying me it was done)

All achievement notifications have an icon to go along with them, they don't represent the reward.

here is a list of Jonathas's rewards:
http://ffxiv.gamerescape.com/wiki/Ac...Item%20Rewards