Although the actual statehood sesquicentennial anniversary is October 31st, the April 17th Postal Bulletin says it will be issued May 29th in Las Vegas. (Confirmed by the May 1 Bulletin; details below.) The design is shown here.

Digital Color Postmark first-day cancel added May 15th.

The stamp ceremony is the only event listed on the Nevada 150 website for May 29th.

From the May 1st Postal Bulletin:

On May 29, 2014, in Las Vegas, Nevada, the U.S. Postal Service will issue the Nevada Statehood 49-cent Forever Commemorative stamp, in one design, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 472200).

The stamp will go on sale nationwide May 29, 2014.

This stamp celebrates the 150th anniversary of Nevada statehood. Nevada became the 36th state on October 31, 1864. The stamp art depicts a close-up view of an area in Fire Canyon, part of Valley of Fire, Nevada’s oldest state park. The painting is an oil-on-Masonite panel. Captured by Nevada artist Ron Spears at dawn, the sandstone formations glow in shades of brilliant reds and yellows — a result of various quantities of iron in the rock, highlighted by deep purple and blue shadows. Art director Antonio Alcalá designed the stamp.

How to Order the First-Day-of-Issue Postmark:
Customers have 60 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office, at The Postal Store website at http://www.usps.com/shop, or by calling 800-STAMP-24. They should affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:

Nevada Statehood
USPS Customer Relations Coordinator
1001 East Sunset Road, Rm 1030
Las Vegas, NV 89199-9998

After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. For more than 50, customers have to pay five cents each. All orders must be postmarked by July 28, 2014.

There are nine philatelic products for this stamp issue:

• 472206, Press Sheet w/Die cut, $117.60 (print quantity 2,500).
• 472208, Press Sheet w/o Die cut, $117.60 (print quantity 2,500).
• 472210, Keepsake w/Digital Color Postmark, $11.95.
• 472216, First-Day Cover, $0.93.
• 472221, Digital Color Postmark, $1.64.
• 472224, Framed Art, $39.95.
• 472230, Ceremony Program, $6.95.
• 472231, Stamp Deck Card, $0.95.
• 472232, Stamp Deck Card w/Digital Color Postmark, $1.99.

Technical Specifications:
Issue: Nevada Statehood Stamp
Item Number: 472200
Denomination & Type of Issue: First-Class Mail Forever Commemorative
Format: Pane of 20 (1 design)
Series: Statehood
Issue Date & City: May 29, 2014, Las Vegas, NV 89199
Designer: Antonio Alcalá, Alexandria. VA
Art Director: Antonio Alcalá, Alexandria. VA
Typographer: Antonio Alcalá, Alexandria. VA
Artist: Ron Spears, Reno NV
Engraver: N/A
Modeler: Donald Woo
Manufacturing Process: Offset/Microprint
Printer: Banknote Corporation of America/SSP
Printed at: Browns Summit, NC
Press Type: Alaprinta 74
Stamps per Pane: 20
Print Quantity: 35 million stamps
Paper Type: Overall Phosphor Tagged Paper
Adhesive Type: Pressure sensitive adhesive
Processed at: Banknote Corporation of America, Browns Summit SC
Colors: Cyan, Magenta, yellow, Black, PMS 651, Cool Gray 1
Stamp Orientation: Horizontal
Image Area (w x h): 1.42 x 0.82 in./36.07 x 20.83 mm
Overall Size (w x h): 1.56 x 0.98 in./183.90 x 150.37 mm
Full Pane Size (w x h): 7.24 x 5.92 in./181.36 x 146.81 mm
Press Sheets Size (w x h): 23.68 x 21.72 in./601.47 x 551.69 mm
Plate Size: 240 stamps per revolution
Plate Numbers: “S” followed by 111111 (6) single digits
Marginal Markings:
Front: Plate numbers in four corners of pane
Back: © 2014 USPS • USPS logo • Plate position diagram • Barcode (472200) in upper right and lower left corners of pane