Wirelessly posted (8700c: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8700/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)
There are two choices. RIM's simulator or Ikodorros BB viewer. The latter runs from your BB and the former is a PC based simulator. I am going to try the viewer next month in a class. You can find links at BBF to them both by searching. I don't have them handy.