I saw an ad for a famous US consulting & training company, & went in to check their courses schedule. I was sure it will be mainly Java & J2EE courses & maybe some .Net & Flex.

This is what I found:

http://bignerdranch.com/schedule

Some Python & Django, a little Ruby, but almost all Mobile - iPhone, iPad & Android.

We'd better get ready for this trend, before it will be too late..

 A blog post on the role of pixel density when developing mobile apps.

Whereas in the past user interface design would largely be concerned with screen size or display resolution only, now the question of how many pixels make up one inch becomes relevant as well. This measure is called pixel density, and expressed in dpi or ppi values. Nowhere is pixel density as broadly distributed as in the mobile world. A low-end android mobile may have a 180 dpi screen, while a high-end one, like the retina display, will boast up to a 326 dpi screen.

Read more: danielsz.posterous.com/pixel-density-in-a-troubled-world

Some web applications require interaction with mobile devices. A key ingredient when writing such application for mobile devices is figuring out which device "talks" with our server, serve it with best fit markup, and make correct business-logic decisions (i.e. send the correct video format, setup package, etc.)

There are several tools that help us to cope with these challenges, all of them are built on top of a database (mostly XML files) which contains a mapping between devices and User Agents.