Google sandbox has always been a big myth. Well I just started a new project (in dutch) named poolbiljart. I made a little over one week ago. Normally it would take many weeks/months before a website gets indexed well in google. But this project of mine is indexed within 7 days. And i ranked well for several competitive words like poolbiljart (which means pocket billiard), poolregels (which means poolrules) and many more in google.nl and google.be. I just placed one link on a relevant directory which ranks in google and bang no more sandbox.

I think today google did there pagerank update, at least I just found out. This was the longest period ever that has gone by without a pagerank update. I jumped out my bed to look at the pagerank of all my websites and I am more than happy. I suggest you check your websites