MidTown is a CSS driven phpnuke theme that uses no tables for the main layout and contains valid XHTML 1.0 Transitional code. This leads to faster page rendering, reduced server load, and better search engine optimization. MidTown is a variable width phpnuke theme that will stretch to fit the browser window. The left blocks can easily be switched on/off for the forums by changing a single setting. The welcome area (right below the tabs) can be set to show the clock and welcome message(default) or it can be changed to a search form for forums or news. MidTown includes a matching forum template and account icons.

You can get more info and check out the screenshots on the MidTown Product Page