There are some lenses out there now - check out BHPhoto - but only Panasonic has the OIS.  We're huge Panasonic fans but are waiting to see if they make a big zoom-tele for us.  We're also waiting to see what happens.

Although there is a limited selection of Panasonic lenses available at this time, one of the great advantages of the 4/3 system is that through the use of an adapter, you can utilize rangefinder type lenses with an M mount.  Without mentioning other manufacturers (of which there are several), I can say that these are among some of the best lenses in the world ranging from super wide angle, to extremely fast prime (non zoom) lenses, to long telephotos and everything in between.   The panasonic body coupled to some these lenses can produce absolutely stunning images.

The u 4/3 format should be around for a long time. Consider these points:

1. Between the lens adapters toffered by Panasonic and the those offered by 3rd part companies, there isn't one lens that can't be used on the G1 or GH1. I've seen and used a G1 with a Voytlander lens that was over 50 years old. Obviously, focus was manual, but focus assist made the task of focusing very easy!

2. Neither Canon or Nikon has any camera that has such a wide variety of lens adapters that allow you to use virtually any lens that's collecting dust on your shelf.

3. The u 4/3 format is based on an open design, so there is the incentive for both small and large companies to offer lens adapters and lens.

In many cases the lens will operate as a manual lens (no electronic functions). However, the optional lens offered for the G1 (45-200) <90-400mm in 35mm format> is a fantastic lens and is priced under $400. Panasonic's AF is very fast and their OIS (Optical Image Stabilization) seems to be the benchmark all others want to be equal to. You can't appreciate how well it works until you try it.

Hmmm Tim, that sounds like a challenge! I have a feeling Evan is up to meeting it! We are looking forward to seeing what you shoot there!