First of all, welcome to WiiChat. Regarding your questions:
1 is it worth doing
- That actually depends on your personal taste. If you like online gaming and competing with others, then yes.
2 what do I need to do it is it just a wireless router (witch I don't have)
- You can also use a Wireless USB connector but I highly recommend using a Wireless router, since it seems to cause much fewer problems with setup.
3 do I need anything for the wii
- No. Just use your Wii to search for the Wireless connection.
4 my other half loves to play the brake out type games is there any available (got to keep her happy didn't give me a hard time about me buying the wii)
- Sorry, I am not so sure about what kind of games you are referring to.
Enjoy your stay here.