No problem, Jeff.
Note that it's not as much about guessing the next value as it is about some output patterns being more likely than others. Perhaps every third bit has a 65% +-2% chance of being a 1, instead of a 50% chance. Perhaps exactly three 0's in a row never happens. Perhaps the pseudo-random number cycle repeats every 64K. Perhaps there's only a 20% chance of a 1 if the value 32 bits prior was a 1.
If you want to see some of this, try running of your NEWID() generators, set it for binary-type output, and run a couple gigabytes of data or so into something like the Dieharder test suite, and see what the results are - I'll lay very good odds there are noticeable patterns in the output.
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