Not sure how I missed this one. RIM’s BlackBerry Bluetooth Stereo Gateway is going for $19.99 with free shipping on Amazon! This first started selling around $50 even with its $80 sticker price so getting it for under $20 is a steal.
Just to remind you the Bluetooth Stereo Gateway lets you stream audio over Bluetooth to your stereo from your BlackBerry. It uses It also works great for your car with an AUX in jack. It uses the same charger as your BlackBerry so all is good there. You also just tap it on the top to turn it on and off. You then use your BlackBerry to raise the volume, change the song, and play or pause music. The cool part is that it offers both RCA two pronged connections along with a regular 3.5mm headphone jack to connect.
NOTE: Let me know if you find a better deal