I honestly don't care too much about speed. My VIA C3 laptop is slow as hell, and I was thinking of replacing my 256MB stick with a 512MB stick (I only have 1 slot), but then I just thought that it's not worth the risk of screwing up my laptop, and it's useable at least, for my needs. I can do nearly anything but gaming and fairly heavy multi-tasking with it.
Yep, believe it or not. It's really energy-efficient and portable too.
Obviously, my Athlon 64 with 512MB RAM is preferred in terms of performance, but it only allows me to use fancy themes, and have more programs open, really, and it's not a neccessity.