With the Android-powered HTC Dream launching on their network sometime in the next few months, T-Mobile’s feelin’ the heat to get their 3G network as prepped as possible. Just a few weeks ago, a poster taped to someone’s wall told us that 3G would hit October 1st.

While we had looked forward to hosting a big nationwide T-Mobile 3G countdown on September 30th, CellPhone Signal is reporting that T-Mobile is going about it the practical boring way and rolling it out gradually. It’s too bad. We’d planned on passing out martinis and miniature beer-soaked sausages at our party, and now no one gets any. T-Mobile owes you hors d’oeuvres.

Roll-out dates and cities after the jump

The roll out dates:

• Baltimore – Aug 18th
• Houston – Aug 19th
• Minneapolis – Aug 20th
• San Diego – Sept 15th
• Los Angeles – Sept 16th
• Phoenix – Sept 16th
• Sacramento – Sept 17th
• Portland – Sept 18th
• Seattle – Sept 23rd
• San Francisco – Sept 24th

Also launching sometime in 2008:

• Atlanta
• Birmingham
• Chicago
• Dallas
• Denver
• Detroit
• Kansas City
• Memphis
• Miami
• New England
• Orlando
• Philadelphia
• Tampa
• Washington, D.C.