Blackberry without BIS, best IM

best IM fro blackberry without bis is
palringo
because it low data consume, can be used for facebook account as well.
wifi and gprs option to connect
sending message time is ok, from sending to receive.

For other than palringo is Nimbuzz,
nimbuzz have better interface, you can use enter to send message.
and there are pictures to every friend.
you can add facebook account and skype as well
but one lack is nimbuzz using a lot of data.
execution time to send message is very fast