JamLegend has definitely sucked up a lot of my time. I love that game.
Gaming in the browser, especially multiplayer interactive gaming like JamLegend, could become a huge industry. The number of players in the space right now is very small.
I'm not sure TopSpin is the market leader in artists communicating directly with fans. iLike has been slowly but surely building outstanding tools to accomplish this, and with Facebook, they've got thousands of fans already signed up.
While I love Spotify as a user experience and definitely plan on using it myself, I'm not bullish on pure music consumption apps as a business. The music labels have unfortunately made it very difficult to get content licenses and even for those who have gotten content licenses, have made it very expensive.
Check out David Pakman's post for more details on how bad the label deals are for most music consumption apps:
Gaming in the browser, especially multiplayer interactive gaming like JamLegend, could become a huge industry. The number of players in the space right now is very small.