Twitter says it will soon enable tweets to include geolocation information. The feature will be implemented on an opt-in basis, and app developers will be given a special API for using the information. It could spell revenue opportunities for the service, but the idea of tweeting one’s specific location could create some security issues, especially if the user does not mean to share the info.

Microsoft’s (Nasdaq: MSFT) souped-up Internet search engine gained a little more ground on industry leaders Google (Nasdaq: GOOG) and Yahoo (Nasdaq: YHOO) in July, according to data released late Monday.