I've never used it but wondered is it safe to use and will one get a virus from it. Also does it have spyware?

Safe, depends on what you're downloading and uploading. Copyrighted material, not safe.
Virus, you could get 1, again, depends on what you're downloading.
Spyware, I don't think it contains spyware at this time.
http://www.download.com/LimeWire/3003-2166_4-10494363.html?tag=tab_rev