This offer isn't that good unless you want a low spend offer. $750 is nothing and 50,000 points is nice. However, if you want more points you'll need to be patient.
This deal was better back in Nov:
Receive up to 65,000 Hilton HHonors™ Bonus Points
Get 40,000 HHonors Bonus Points when you spend $750 with your Card within the first three months of Cardmembership1
Get an additional 25,000 Bonus Points when you spend $3,000 with your Card within the first six months of Cardmembership2
•Earn 6 Hilton HHonors™ Bonus Points for every dollar of eligible purchases at any participating hotel within the Hilton HHonors portfolio of brands, at U.S. stand-alone supermarkets, at select major drugstores, on gasoline at U.S. stand-alone gas stations, and for U.S. wireless and home telephone, cable TV and satellite TV service. You will receive 3 HHonors Bonus Points for each dollar of other eligible purchases.3
•No Annual Fee
•No Blackout Dates: No blackout dates when redeeming for hotel stays
•Silver Status: Complimentary Silver status for life of membership
•Offer Expires November 30, 2012
•Welcome bonus offer not available to applicants who have had this product within the last 12 months or any other Consumer Hilton HHonors™ Card from American Express® account within the last 90 days.