Ok, I have since this posting, upgraded my processor to the sonnet encore 1.4ghz processor (single). I also purchased the radeon 8500 mac edition graphics card. here are my results...

Results 134.10
System Info
Xbench Version 1.1.3
System Version 10.3.6 (7R28)
Physical RAM 256 MB
Model PowerMac3,5
Processor PowerPC G4 @ 1.4 GHz
Version 7455 (Apollo) v3.3
L1 Cache 32K (instruction), 32K (data)
L2 Cache 256K
L3 Cache 2048K
Bus Frequency 134 MHz
Video Card ATY,R200
Drive Type WDC WD800JB-00JJA0
CPU Test 142.46
GCD Loop 157.63 6.16 Mops/sec
Floating Point Basic 168.07 607.81 Mflop/sec
AltiVec Basic 170.18 4.94 Gflop/sec
vecLib FFT 176.16 2.73 Gflop/sec
Floating Point Library 88.88 3.56 Mops/sec
Thread Test 114.28
Computation 81.33 1.10 Mops/sec, 4 threads
Lock Contention 192.12 2.41 Mlocks/sec, 4 threads
Memory Test 116.68
System 150.50
Allocate 926.42 604.31 Kalloc/sec
Fill 116.49 927.22 MB/sec
Copy 97.38 486.88 MB/sec
Stream 95.28
Copy 95.77 700.05 MB/sec [altivec]
Scale 99.70 735.78 MB/sec [altivec]
Add 93.29 597.07 MB/sec [altivec]
Triad 92.66 566.14 MB/sec [altivec]
Quartz Graphics Test 156.61
Line 132.17 3.36 Klines/sec [50% alpha]
Rectangle 134.76 9.48 Krects/sec [50% alpha]
Circle 151.48 3.49 Kcircles/sec [50% alpha]
Bezier 173.55 1.89 Kbeziers/sec [50% alpha]
Text 218.47 3.56 Kchars/sec
OpenGL Graphics Test 128.93
Spinning Squares 128.93 90.22 frames/sec
User Interface Test 238.39
Elements 238.39 76.68 refresh/sec
Disk Test 105.02
Sequential 94.64
Uncached Write 48.75 20.32 MB/sec [4K blocks]
Uncached Write 136.60 55.94 MB/sec [256K blocks]
Uncached Read 142.39 22.54 MB/sec [4K blocks]
Uncached Read 134.96 54.53 MB/sec [256K blocks]
Random 117.95
Uncached Write 111.55 1.67 MB/sec [4K blocks]
Uncached Write 153.46 34.61 MB/sec [256K blocks]
Uncached Read 102.73 0.68 MB/sec [4K blocks]
Uncached Read 114.98 23.66 MB/sec [256K blocks]