Hi there,
I'm Atrophical in the game.
I saw a cube, which was originally in Guest (now moved to Guest2), and it was a bit torn by griefers. I repaired the multi-story cube, created granite and sand platforms all around it, re-done the windows on the bottom (with doorways), dug out a basement (which had a rather immature sprite, which had been dug up by griefers and repaired. I also done very light 'decor' (the coloured walls) which took quite some time).
I also created very high glass walls around the roof, around an already existant sprite of Ness on a bike (which is NOT mine), as well as building a rather large glass platform (with bridges to other nearby towers), and I'm currently building a very tall tower, which I plan to decorate with blocks that resemble beds, bookshelves, etc. (to the best likeness that can be achieved in Minecraft Classic).
Just looking to see if this is sufficient to be promoted to a Builder status.
Seeing as there's quite a bit that's been made, I've recorded a video (with my phone, but you can see everything clearly. FRAPS kept giving lockups at random intervals for several seconds).
YouTube - Minecraft public server (Classic) (the video isn't public, though can be seen from the link and link only).
Edit: Almost forgot, the wooden flooring on the ground floor was done by me, also (when I got there, it was torn to shreds, with mostly grey blocks).