The Starwood Preferred Guest personal and business credit cards from American Express now come with 35,000 bonus Starpoints for spending $3,000 and $5,000 respectively in the first three months of cardmembership.

Links:

Starwood Preferred Guest® Credit Card from American Express (personal)
Starwood Preferred Guest® Business Credit Card from American Express

The normal sign up bonus is 25,000 points, the twice yearly limited time offer is 30,000 points. This is the highest public sign up bonus ever on these cards.

The SPG cards' 30k offers end today 9/14/15. Presumably tomorrow the standard 25k offers will return.

The Starwood Preferred Guest personal and business credit cards from American Express now come with 30,000 bonus Starpoints, up from the normal sign up bonus is 25,000 points.