The Sony TR3 is a Centrino processor, AND it makes a huge difference on runtime; 5-6 hours easily... closer to 7+ working with spreadsheets, word processor or internet access. Accessing hard drive or cd rom is what cuts into runttime
When I bcamame commission for my daughters basketball league, I had no clue that I would be answering 30+ emails daily. Because of this work load, I went ahead and got a wireless card so I could respond in between sales calls etc (got tired of sitting in Starbucks). Now way I could handle the job trying to do it once I got home at night.
Which brings me to the wireless 802.11
g which is built in. For a long time, 802.11
b was the standard. Both have similar range (line of sight) but the difference is best explained by an example... I can not use 802.11b in my backyard patio because I lose 80% of the "packets" going through my home. Starting with 11 mbs less 80% leaves 2.2 mbs which is useless. However, with 802.11g we start at 54 mbs less the same 80% leaves +/- 10.8 mbs which is adequate for internet and email.
I bought the Sony because of form factor only. The included software, which is supposed to be fully integrated, is "not 100%", and the included softwares are not premium titles.
Buy a Centrino machine if battery life is important to you. There's better software out there that integrate easily, so this shouldn't be an issue.