A free app called YouCast for Blackberry should meet your needs. With this app, you can exchange media files with your blackberry friends instantly without worrying about file size limit. The push activation application is based on Wireless SMS or email. It works on WIFI and data plan, no PC required.
To install, point your bb browser to http://m.youcast.net/blackberry.html
Detail product information is at http://www.youcast.net/
Check it out!
I'm used to share video/photo via Flickr and YouTube. The new version of Blackberry Messenger could transfer video files to my Blackberry buddies. It's pretty good except the max size is 6MB. But most recorded videos are much bigger. Is there any app can let me transfer big video file to my Blackberry buddies? Thanks,