Yup, mine's running comfortably at 3Ghz with 30-40° under load. Make sure you have the recent one (G0), as the older one is liable to burst into flames (Well, not really. But the new one has much more headroom)
Just experiment with slight increases, testing with Prime95 (4 needed, for each core) for an hour after every say 0.5Ghz increase (this is up to you though, but that's how I found my maximum clock). If it's unstable at that, drop it down and try again. It's a fairly time consuming process, but it can give a great increase. It's given me 20% more CPU performance
With a good setup you can run it @ 3,4-3,8GHz. But only if your CPU is a G0 and you have to have a good Mobo and good cooling. The older B3's are bad for OC. 3GHz is mostly the maximum...
do it in your bios, i hate having programs running in bg that i dont need. jump up in 100 mhz increments. if it starts shitting out on you then do it in 50mhz steps
ive punished my q9450 to run at 3.6 as opposed to its weaksauce 2.66ghz. it hates priming but is stable for a 24/7 OC
I've no idea how good/terrible the standard cooler is, I got a tray CPU and fitted an AC Freezer 7 Pro on it But just go into teh BIOS, find the clock utility, and increase slowly. Then run speedfan and go run Prime95 or play some heavy games. Eventually you'll find a spot where it's either unstable, or running too hot. Then just decrease the overclock, and leave it there
If you're thinking that way (and also wondering if overclocking is for you) then it probably isn't - you need to be wholly confident that it's the right thing to do AND you also need to know what you're doing. Another thing to consider is that it'll likely reduce the lifespan of your parts, especially if you start overvolting to get more overclock out of things.
It depends. If you're willing to spend a few hours doing it right for maybe a 30% increase in power at best (maybe you could get more with some decent cooling and a lucky chip, I don't know), then do it. Have a read up on it first, and take your time. If done right it can give a very noticeable performance increase, and would be very noticeable in single-threaded LFS, which only uses one core. It's up to you really