I tried the test suite and was able to save a test. However, the saved test is not listed although I was able to upload it afterwards:
$ ./phoronix-test-suite benchmark audio-encoding
Would you like to save these benchmark results (Y/n)? y
Enter a name to save (or merge) these results: liquidat-audio-encoding-2008-04-03
Enter a unique identifier for distinguishing this series of tests: liquidat-audio-encoding-2008-04-03-t900
Results Saved To: test-results/liquidat-audio-encoding-2008-04-03.xml
Do you want to view the results in your web browser (Y/n)? y

Would you like to upload these results to PTS Global (Y/n)? n

$ ./phoronix-test-suite list-saved-tests
PHP Notice:  Undefined offset:  2 in /home/liquidat/Downloads/phoronix-test-suite/pts-core/pts-run-cmd.php on line 6
PHP Notice:  Undefined offset:  3 in /home/liquidat/Downloads/phoronix-test-suite/pts-core/pts-run-cmd.php on line 7

Phoronix Test Suite - Saved Results

$ ./phoronix-test-suite upload liquidat-audio-encoding-2008-04-03
PHP Notice:  Undefined offset:  3 in /home/liquidat/Downloads/phoronix-test-suite/pts-core/pts-run-cmd.php on line 7

Uploading: test-results/liquidat-audio-encoding-2008-04-03.xml
Results Uploaded To: http://global.phoronix-test-suite.com/index.php?k=profile&u=liquidat-12334-29642-6968
Still, despite these problem I must admit that I do indeed like the outcome of the tests and the possibility to compare the results with other machines.

Since I will get a new machine quite soon I'm looking forward to compare the numbers of my old and my new machine!