Differences in editing for TV/film etc.

I've been in the TV production/promotions business since '96. And I've learned alot in that time. Probably the thing I learned the most is that editing is my strongest skill. And now I am thinking of getting out of TV promotions (I've been a promotions producer for about 5 years or so now) and trying to move into strictly editing. And I've got plenty of time to make a decision and make the transistion.

What can you wonderful folks tell me about strictly editing? How much different is editing :30 second spots from a 30 minute short, especially in terms of editing on a computer? How different is the pay/benefits? Suggestions on making the transistion? How can I get a post house to hire me to edit longer-form stuff based on my work which is at most :30 seconds spots? Inquiring minds want to know... Thanks in advance for your advice/stories/help/input/etc.