Pervy,
My link list script,
DragonList has a very basic import function. It's adequate if you're going to import batches of hosted sites at a time, but it's not built to import your existing database, if that's what you're looking to do.
Considering the many potential differences from script to script, what Xpowerlinks is offering is about the best deal you're going to find. I offer a similar service - I can help you import your existing links, but it's going to depend on how your current database is set up.
Someday somebody will get ambitious and create a script that will import most of the known linklist script databases, but that can be done fairly easily using PHPMyAdmin - it would be like reinventing the wheel, IMO.