Research In Motion has announced financials for its fourth quarter, which ended on February 28th, and they're mightily impressive.

The company reported revenues of $3.46 billion for its Q4, up 84 per cent year-on-year. Net income for the quarter was $518.3 million, up 25.6 per cent year-on-year.

RIM shipped 7.8 million Blackberry handsets during the quarter, adding 3.9 million net new BlackBerry subscriber accounts – taking the total to around 25 million subscribers.

The company also announced results for its full 2008 financial year, with revenues of $11.07 billion – up 84 per cent from 2007 – and net income of $1.89 billion, up 46.3 per cent. RIM shipped around 26 million BlackBerry devices during the full year.

That's a pretty decent base to roll its new BlackBerry App World out to. Co-CEO Jim Balsillie said the store is "not a big profit driver" in the ensuring analyst call, but said it's already been popular with users.

He also outlined RIM's desire to bring operators on board. "Let carriers have their own store within the store, let them have their own branding, let them have rev share".