I have the Curve 8530 for sprint, and I use the slingbox mobile app on it with no issues, I use the version 220.127.116.11
Use (replace x with an h in xttp, duh!) this link to get the Bold Slingplayer 18.104.22.168: xttp://download.slingmedia.com/player/mobile/bb1002/US/SlingPlayer_bold_EN_US.jad
It will prompt you if you would like to upgrade to the latest version of 22.214.171.124. I have been using this now for 6 months with no issues what so ever.