Get it on Whitelist and you got even more much rate limit!
Read section Whitelisting
2009/8/2 Scott Aikin <haw...@gmail.com>
> I've got an OAuth site that lets people register through Twitter to
> create a profile and post to my site. When you see comments or posts
> by these users I show their Twitter profile information and have been
> retrieving it with users/show. The problem is that I can only show
> this information 150 times each hour which quickly runs out. What is
> the best-practices method for accomplishing this? Do I need to cache
> their profile information and update it via my crontab? I like the
> real-time nature of my current solution, but with the 150 limit it's
> just not going to work. Any suggestions?