Which is why I turned mine off. I'm helpful to no end, yet I make one negative remark about Dell and my reputation goes to the shitter. Reputation is pointless when egos can easily abuse it.
There will always be something faster, the question is, do you want to continually hold off on buying something because it might be a few milliseconds faster? Most of the bottlenecks on laptops don't have anything to do with the...
Depends how long you plan on having the laptop. If you want long term performance and future proofing, go Turion. If you want better short term performance and intend to buy another notebook in a few years, go Core Duo.
Graphics card is not an option, as it is integrated into the motherboard and there is no graphics card slot. Only other upgrade would be to go from a Sempron to a Turion 64.
Keep the old hard drive as a backup in case you need to send your laptop in for warranty work. Its easier to swap it before sending it in then to get your laptop back and find out they wiped the hard drive, swipped it with a new one that...
not to mention, swapping a Merom in place of a Yonah requires a bios update. Think about it from the company's (Dell's for instance) perspective. Which is more profitable for them: releasing a BIOS allowing customers to upgrade their own...