Q:So How can I avoid/find one of these products?
As with all previous hardware revisions of the WRT54G and WRT54GS, version identification can be made by the Serial Number. Serial Numbers can be found on a small white sticker next to the UPC code on the product box. Our Autopsy Guide always contains the latest differentiating information, but here's the quick and dirty.
The first four digits of the serial number will indicate the packaged hardware version. If unit is outside of the box, the version is indicated on the silver stick on the bottom front of the router.
WRT54G
CDF0 = WRT54G v1.0
CDF1 = WRT54G v1.0
CDF2 = WRT54G v1.1
CDF3 = WRT54G v1.1
CDF5 = WRT54G v2.0
CDF7 = WRT54G v2.2
CDF8 = WRT54G v3.0
CDF9 = WRT54G v3.1
CDFA = WRT54G v4.0
CDFB = WRT54G v5.0 VxWorks based
WRT54GS
CGN0 = WRT54GS v1.0
CGN1 = WRT54GS v1.0
CGN2 = WRT54GS v1.1
CGN3 = WRT54GS v2.0
CGN4 = WRT54GS v2.1
CGN5 = WRT54GS v3.0
CGN6 = WRT54GS v4.0