First of all, it's not called (and I assume deliberately) "Humble Bundle", but "Humble ... debut", just in case you are still hacking away on that point.
(Please don't complain about getting not enough in this "bundle", you are just spoiled by the first few bundles which offered you many indie games for much less than they were actually worth. Also if you don't like the offered genres, don't buy it.)
Second of all, "Binding of Isaac" and "Blocks that Matter" have been added.
I got the first one on release day and it has been pretty fun, "Binding of Isaac" is a Zelda and Rougelike inspired Top-Down Shooter/Dungeon Crawler with randomly generated levels and items (in a playthrough you will get about 20 out of 200). It's also super hard.
If you have not gotten it already, you probably should now.