My other tiniest one, now gone because the squirrels dug it up twice in one day. This is 'Teeny-weeny Bikini' late June. I'll search for a replacement.
I mentioned this one above - 'Tiny Tears', early July. Fast growing - I've had it two years.
Another mentioned above, 'Twist of Lime', mid June.
Another very small hosta that is presently growing slowly for me. A couple of years ago a squirrel dug it up and left it to die. I found it and it survived, but hasn't grown as fast since. 'White Dove'. It DID bloom for me for the first time this year at the very end of August. The plant pic is from late June.
'X-rated' - an enthusiastic mini. I divided it in spring 2011 and replanted what I didn't sell in a group of 3. This pic, mid June.