I have been using Simply Mepis on my HP/Compaq 6530b for about four months and overall I am quite happy.
I installed Wcid as a wireless manager and this has made using my wireless very easy.
The on-board speakers do not work yet but external speakers plugged into the headphone jack work fine. I am still working on sound.
The external monitor does not work yet and I am working on that. I do not think that this laptop is totally supported in Linux yet, but update are coming out regularly.
Best of luck