Google Maps version 5.2 has 3 main additions……See Details.
@TatWza

The 1st is the new edition allows users to tweet their reviews of places and share recommendations with Hotpot friends. 2nd, there’s Latitude pinging, which enables you to send a quick message to a nearby Latitude friend rather than having to use a text or call; they’ll receive an Android notification from you asking them to check in at a place, and when they check in using your request, you’ll get a notification right back so you know which place to go to meet up with them. last but not least, a new ‘Search More Places’ button has been added under the standard list of places to check in. Not bad Google!

Android Market