Today is the last day for Nintendo 3DS users to sign up as a 3DS Ambassador to qualify for 20 free games.
From Nintendo:
Today (Aug. 11) is the last day for current Nintendo 3DS owners to register for the Nintendo 3DS Ambassador program. Just connect your Nintendo 3DS to the Nintendo eShop by 11:59 p.m. Eastern time to receive 20 free downloadable games.
The offer is due to the recent price slash of the 3DS.

The undeniable rumor, as expected, has come to be true and Microsoft’s Major Nelson has revealed September 5th as the day the Xbox 360 shall drop in price. Although not surprising, this is really the first good price drop for the 360 hardware which does not involve phasing out an old product line.