Yesterday, I bought a Linksys WRT54G v.2.2 in a shop in Holland. Today, I found out that there are also hardware version 3.0. and 4.0 and that 5.0 will soon be there. (I did not find release dates of these products.) Does this mean that I have bought an aged product? Should this still be for sale at all? Are there any real drawback for having this older version?