you are pretty much there fenderrobban as far as I/O from the Arduino to the VB app. You need to learn to use some of the string functions in VB. Look at my previous post with instr and mid and figure out what I am doing to pull the info out of the total string coming over from the Arduino.
The last Arduino code you sent had pretty much all commented out. you need a Serial.println() to terminate the string. look at what is coming out the Arduino side and compare it with what you have coded it to expect on the VB side
You can use VB to display the results in the form as a text box or label, or even drop them into a list box. You just need to take one step at a time and build your code on that.
I used the debug.print just because it was the easiest way to see if you were getting anything over the line. Now you can use any of the widgets or functions in VB to manipulate it and get the output you want
Charting the output will require you to really know what you are doing in VB. Don't even think of it till you have a much better understanding of how to manipulate string and numeric values in VB. The chart widgets included in VB are not that good, and they are kind of hard to learn, unless you have a pretty good feel for what you are coding.