Well, the club racing board has proposed all kinds of new classes for 2007. There are a total of 5 new classes, with slots for 2 more potential classes. 3 of the new classes (and the 2 potential classes) would all be national classes.
First, ITR would be the new tier in IT racing, for cars that are too fast for the current ITS. This would, among other things, finally address the many owners of E30 BMW M3s who have wanted their car listed in ITS, a class for which it is manifestly too fast. The proposed ITR is just about right, and the E30 M3 would be one of the cars there (along with the E36 325 and 328, the Porsche Boxster, and a few others.) ITR, like all other IT classes, would be regional only. This probably doesn't do any damage to race grouping as it can naturally be grouped with other IT classes based on which ones are succeeding/not succeeding at filling a track, or it can be grouped with with the faster Touring cars (similar tires and speeds and all that.)
The other new regional class would be F1000, with 1 liter and smaller motorcycle derived motors. Although Formula Continental conversions are referenced, the rules appear to focus on FF1600/FF2000 style flat bottomed tube frame cars (remember, Formula Continental is not exactly the same as FF2000, although they both carry the FC class letters and race against each other. Classic Continentals run smaller, more agressive motors and are allowed much more agressive aerodynamics.)
One of the National class changes is to remap Touring (again); T1 becomes T2, T2 becomes T3,
and T3 becomes T4. The new T1 (as usual) is for cars that were too fast to list in the previous T1.
Where things get interesting is the appearance of the new "Prepared" classes, 2 for starters and 2 potential. BP and DP would be created right away, and be matched up against World Challenge GT and Touring (respectively). They also would line up nicely with (new) T2 => BP and (new) T4 => DP. AP and CP are reserved for the future, intended to line up with the new T1 and T3 classes.
The large number of new national classes is problematic; there have long been too many national classes. The mechanism for dealing with the "national class runneth over problem" may cause some pain in 2008, when National eligibility for the new classes kicks in. The July Fastrack includes (on page 2) the new rule that the runoffs will have no more than 24 national classes represented, and the classes with the weakest participation will be on the bubble for non-inclusion. In 2008, somebody's going to get left out. This could be the wedge for consolidation; a CSR/DSR mashup has been discussed in the recent past and smaller production cars (GP+HP anyone?) might end up here too.