Tweetbot (the best Twitter client available) has just been updated.
Among the new features are...the option to open links in Chrome or 1Password instead of Safari
The various Google apps already have the ability to open links in Chrome instead of Safari, so it's great that we're seeing other devs add the same function. Helps get around the inability to set a default browser (one of the few remaining things that would tempt me to Jailbreak).
Tweetbot (iPhone & iPod Touch)
Tweetbot (iPad)