Since the Slot A and Socket A cpu are different, so it the way for overclocking them. If your motherboard allows it, you can set your FSB higher. This will however o/c your entire system, which is good or bad depending on how you look at it. O/c via the FSB will however yeild only a minimal overclock when compared to o/c via the multiplier. This is where the cpu's are differnet. For the Slot A Athlon your only choices are to buy a gold fingers device ( try
www.k7oc.com for more information) or soldering (not recommended unless you have done it before.) The Slot A cpu presents one more challange, L2 cache. This can be a limiting factor since the L2 cache on these cpu's runs only at a fraction of the cpu speed. If it comes to the point where this is a problem, there are ways of adjusting it. This obviously is not a problem with the Socket A cpu's since they have on-die-cache.
The Socket A cpu's again if your motherboard allows, FSB adjustment you can try that. Or if that is not enough for you, you can use the "pencil trick"
http://www.hexus.net/pencils.shtml to up the multiplier and voltage.
With both cpu's make sure to monitor the temps and up the speed in small increments and test. What good is a 700@1gig if it carshes? Case fans also help to further lower the temps.
Adrian
Make sure you check out this site
Amd overclocking