Here's the past week's (give or take a few days) crop of blog carnivals (in no particular order)...
The second Carnival of Mathematics is up at Good Math, Bad Math.
The inaugural edition of the Carnival of Mathematics has arrived at Abstract Nonsense. If you ever enjoyed reading Martin Gardner's Mathematical Games, Douglas Hofstadter's Metamagical Themas or A.K. Dewdney's Computer Recreations columns in Scientific American back in the day you'll love this new blog carnival.