I am about to buy my first TiVo unit, the fancy new Series 3, from amazon. The only network adapter I can find on their site is TiVo Wireless G USB Network Adapter for Series2 DVR (AG0100) . I also looked on Best Buy and Circuit City and can't find one that says it works for Series 3 too. Only the TiVo site specifically calls out that they have one that works with Series 2 and Series 3. But it looks like the same adapter. So, can I buy the one on amazon or my local store, or do I have to buy from TiVo?