O'Caml 809 782 Chars
open String let w=length let c s=let x=ref 0in iter(fun k->if k='#'then incr x)s;!x open List let(@),g,s,p,q=nth,ref[],ref 0,(0,1),(0,2)let l=length let u=Printf.printf let rec o x i j=let a=map(fun s->copy s)!g in if snd(fold_left(fun(r,k)(p,l)->let z=c(a@r)in blit(make l '#')0(a@r)(i+p)l;if c(a@r)=z+l then r+1,k else r,false)(j-l x+1,true)x)then g:=a else o x i(j-1)and f x=let s=read_line()in if s.[1]='='then g:=rev x else f(sub s 1 10::x)let z=f [];read_line();;for i=0to w z/3 do o(assoc z.[i*3]['I',[p;p;p;p];'O',[q;q];'Z',[q;1,2];'T',[0,3;1,1];'L',[p;p;q];'S',[1,2;q];'J',[1,1;1,1;q]])(Char.code z.[i*3+1]-48)(l!g-1);let h=l!g in g:=filter(fun s->c s<>w s)!g;for i=1to h-(l!g)do incr s;g:=make 10' '::!g done;done;iter(fun r->u"[%s]\n"r)!g;u"[==========]\n";u"%d\n"(!s*10)
