Will the Blackberry battery get messed up in anyway if i leave it plugged in the usb for a long time?

Lithium-ion batteries cannot be overcharged since they include protection circuitry, nor do they suffer from the memory-like effects of NiCd or NiMH batteries. This means you can plug it in for as long as you like whenever an opportunity presents itself, in fact this is encouraged.

thanks for the info! now i can use my blackberry as a modem for as long as i like