There are a bunch, but if myspace isn't doing it for you than you're just plain not working myspace. Or not playing out enough (depending on if you're in a band or not). It's all about numbers, and Myspace is one of the top 5 largest websites on earth. There are millions of users. How many have heard your music? How many "friends" do you have? If you really want to work it, you need to be adding people every day. Go to similar "hot" artists' myspaces, look at their friend list, start from the end (the newest users most open to new bands) and add every single one of them. You should be adding 10 pages a day. On the flip side, every single person that "friends" you, you should comment on their page thanking them for the add or whatever, along with something personalized like "how's the weather in Arizona" or "hope we can play there sometime", etc. Any body that messages or comments you, have real conversations with them.
Also, look as huge as you possibly can on your myspace. Get a promo picture that really looks slick. If the guys in your band are good-looking, put the "hottest" one front & center and make it your default pic. If they're ugly, get something else as your promo pic. To me, it doesn't matter why you hook people, as long as you do. Myspace is all about the "whole package": making great music isn't enough anymore. You've gotta give people everything: concert footage, well-mixed songs, good promo pics, bios (about your music, not about how many bassists you've had!), merch, etc. Then, myspace will start working for YOU!
Example: my band's page:
www.myspace.com/everestband . We're just five dudes making sweet music, we don't have much of a draw anywhere yet (no time for touring), but we look huge, so we sell cd's & shirts & stuff.
I'm ranting, I'll shut up now, but I figured I'd give you some advice on myspace since you obviously want to get more well-known