I planned to buy a Pentium laptop on this thanks giving. I was totally confused on Pentium M vs Pentium 4 vs Centrino. I  got good idea from cnet.com . Here we goes..

Pentium M
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- It is "thin & light" or "ultra portables" compared to Pentium 4 laptop
- It is little slower and are a little pricier ($/Ghz) then P4.
- It consume less battery, generate less heat compared to P4.
- If mobile is priority then,  you might look for laptops with Pentium Ms, and preferred with Centrino. If performance  is priority than you might go for Pentium 4.

                  I use to dump lots of .Net related Software and Virtual PC 2004. I worked lot on AMD ,Celeron and Pentium 2/3/4 but among this my Pentium 4,1.6Ghz,1GB RAM giving the best performance.

At last but not least I buy the Pentium 4, 2.5 Ghz IBM laptop with 1GB RAM. This laptop is bit heavy but hope will give the best performance for my .Net and Biz Talk 2004 environment.

Cheers...Nice thanks giving.

Suresh Behera