This is not real growth but websites starting to accept bitcoin again after the mtgox hack.

I've been counting the number of links on that page and there is a huge drop 2011-06-20.
This numbers are back to normal on 2011-07-02
I'm missing some data between 2011-06-22 and 2011-07-02 but you can see below

2011-06-01: 318 links
2011-06-02: 332 links
2011-06-03: 344 links
2011-06-04: 352 links
2011-06-05: 359 links
2011-06-06: 373 links
2011-06-07: 383 links
2011-06-08: 398 links
2011-06-09: 407 links
2011-06-10: 415 links
2011-06-11: 425 links
2011-06-12: 428 links
2011-06-13: 442 links
2011-06-14: 450 links
2011-06-15: 458 links
2011-06-16: 461 links
2011-06-17: 470 links
2011-06-18: 485 links
2011-06-19: 500 links
2011-06-20: 505 links
2011-06-21: 468 links
2011-06-22: 470 links
2011-07-02: 585 links
2011-07-03: 595 links
2011-07-04: 596 links