Intresting, they now post a procedure on their website for upgrading from an OS lower than 1.4:
http://education.ti.com/calculators/downloads/US/Software/Find-OS

As reported earlier, the new Operating System for the TI-Nspire, version 3.0.1.1753 to be exact, has been released today by Texas Instruments.

Most of the new features that come with this OS have already been discussed, as they were announced in the previously released Release Notes.  To outline again quickly, the Vernir Data Quest App has been added, both 3D graphs and Differential Equation graphs are now possible, Exact values appear in the graphs of functions, and a new Document type, *.tnsp, has been introduced to allow online publishing of TI-Nspire documents.

More interesting, however, is that TI has released different OS files for the new Nspire CX Series, with extension *.tco for the TI-Nspire CX and extension *.tcc for the TI-Nspire CX CAS.  These two file groups join the original *.tno and *.tnc for the original TI-Nspire and TI-Nspire CAS, respectively.  A quick analysis comparing the *.tno and *.tco file types yields some interesting results.  First, in order to save on size, the example *.tns documents are no longer included in the OS Upgrade for the *.tno file (although they are present in *.tnc).  Secondly,  both TI-Nspire.img and boot2.img are in fact smaller on the TI-Nspire CX OS than in the regular TI-Nspire.  Finally, although the 84 Emulator has been removed from the TI-Nspire CX, the full TI-84 Plus ROM and emulator are still present on the TI-Nspire CX.  Does this mean it will in fact be possible to use the Emulator, either through an actual TI feature or a later hack???

It should also be noted that a new boot 2 version is present in these files.  In addition, nspire_emu will not run the OS.

As a closing note, it is probably best to hold off on upgrading the OS on an actual Nspire until further testing is done.  As far as is known now, this OS very well might block downgrading/Ndless/countless other things.

WARNING:  Upgrading to OS 3.0 will block your ability to downgrade to an older Operating System!  

Update:  According to tests performed by critor, removing the new boot 2 with TNOC will allow one to successfully upgrade and then downgrade back to an older Operating System!!  Be sure to remove the boot 2 before attempting to upgrade!!!

Here are links to the new OS files:

TI-Nspire
TI-Nspire CAS
TI-Nspire CX
TI-Nspire CX CAS

On the topic of resolution, I'm pretty sure I read on TI's site that the screen is still 320x240 pixels. Understandable, because otherwise it would be pretty hard to make the OS compatible with both old and new models if the resolution was different.

Yep, the screen definitely is still 320x240!

Well, anyways, here is a second shot at this, as I had to go back and do it!  (Yes, I cheated and used a pre-written console input class ).

public class Main {
    public static void main(String[] args) {
       int lowScore=Integer.MAX_VALUE;
       int sum=0;
       int numValues=0;
       int currGrade;
       while(true) {
           System.out.print("Enter Grade:  ");
           currGrade=TextIO.getInt();
           if (currGrade<0) break;
           if(currGrade<lowScore) {
               if(lowScore!=Integer.MAX_VALUE) sum+=lowScore;
               lowScore=currGrade;
               numValues++;
           }
           else {sum+=currGrade;numValues++;}
       }
       System.out.println("Average:  "+(double)sum/(numValues-1));
    }
}


Maybe something like this?

EDIT:  fixed major error in for( loop...


public class average {

public static void main(String []args) {

public Arraylist<Integer> grades;
double total=0.0;
int minGrade=Integer.MAX_VALUE;
int minIndex=-5;

//Read input, adding each grade to the list with grades.add(new Integer(grade_value));

for(int x=0;x<grades.size();x++) {
if(grades.get(x).intValue()<minGrade) {
minIndex=x;
minGrade=grades.get(x).intValue();
}
}

grades.remove(minIndex);

for(int x=0;x<grades.size();x++)
total+=grades.get(x).intValue();

System.out.println(total/grades.size());

}
}


Time to email TI-Caresless about this!

(Although, I have been doing terrible with e-mails to large companies in the past few weeks.  Two of my emails to the College Board and one email to TI have gone ignored )

Using the same principles as 1337mod, it should be fairly simple to replace the language/text files.  It just might be a bit of annoying work, but I think it would be doable.