Anyone used nikon lens adapter on Oly 4/3 body?

I'm thinking of buying the fast Nikon 50mm f1.4G prime as I will be making the switch to a Full Frame system in the next 12 months but in the meantime I would like to be able to use this on my Oly E620 Body. I have found Nikon Lens to Olympus 4/3 body on Ebay for about $20 - 2 types: one without AF and one that beeps when in focus. Has anybody used these or heard if these adapters work ok, or could this damage the E620 body in any way???

I have used a few off of eBay. None with focus confirmation though. The ones I have used worked fine. Yashica, Pentax, Leica M to m4/3rd and probably a couple more. You may find the finder a little difficult to focus through with no focus screen. I never had any body damage.

Thanks Greg, I've ordered one so I'll see how it goes...