Basically, PT's PHUNKEDOUT420 played with the web address on STS9's website and found all of the unannounced dates with Umphrey's Mcgee. I went and did this myself and it actually works. For instance, this link will take you to buy tickets for the Gramercy Theatre show on 07/24, which has yet to be announced.
UPDATE: Since the bands clearly read this blog, they decided there was no use holding the dates back any longer. Here's the official dates with after parties.
07.10.08 - Willow Island at Alliant Energy Center - Madison, WI
07.10.08 - Barrymore Theatre - Madison, WI - STS9 AFTER PARTY!
07.11.08 - Live on the Levee - St.Louis, MO - FREE SHOW!
07.12.08 - Westfair Amphitheatre - Council Bluffs, IA
07.15.08 - Moonlite Gardens - Cincinnati, OH
07.16.08 - Innsbrook Pavilion - Glen Allen, VA
07.17.08 - Lifestyle Communities Pavilion - Columbus, OH
07.18.08 - White River Lawn - Indianapolis, IN
07.19.08 - Charter One Pavilion - Chicago, IL
07.19.08 - House of Blues - Chicago, IL - STS9 AFTER PARTY!
07.23.08 - Higher Ground - Burlington, VT - STS9 ONLY - TWO SETS!
07.24.08 - Roseland Ballroom - New York, NY
07.24.08 - Blender at Gramercy - New York, NY - STS9 AFTER PARTY!
07.25.08 - Festival Pier at Penn's Landing - Philadelphia, PA
07.25.08 - Fillmore at TLA - Philadelphia, PA - UMPHREY'S AFTER PARTY!
07.26.08 - Bank of America Pavilion - Boston, MA
07.27.08 - Pier 6 Concert Pavilion - Baltimore, MD
07.30.08 - House of Blues - Myrtle Beach, SC
07.31.08 - Koka Booth Amphitheatre - Cary, NC
07.31.08 - Lincoln Theatre - Raleigh, NC - UMPHREY'S AFTER-PARTY!
08.01.08 - Masquerade Music Park - Atlanta, GA - INDOORS AFTER PARTY!
08.02.08 - Masquerade Music Park - Atlanta, GA - INDOORS AFTER PARTY!
STS9 CLOSES THE SHOW IN: St. Louis, Council Bluffs, Glen Allen, Philadelphia, Baltimore, Myrtle Beach, Cary NC, and BOTH nights in Atlanta!