Did a bit of searching and come across a program called 3DWin. Its a free program, can convert many file types and most importantly, it can import .lwo files and export them to .ma ready for maya.
Here's the link - Click Here
I haven't tried it yet as I dont have Lightwave either or any .lwo files, it does however have some options you can look through when converting.
The page I found this on also have some links to other 3D converters you may also find useful.
Here's the link for that - Click Here
I also found a plugin for maya that allows for the import/export of .lwo files too.
Here's the link - Click Here
Hope this helps 