What can we learn from software development job posts?

What can we learn from software development job posts? A lot!

• No one is building apps for the Palm Pre, and not too much for Android
  
• More Blackberry development than iPhone
  
• No more Web 2.0 jobs (AJAX, widgets, etc.)
• Still plenty of demand for legacy/niche products (e.g. mainframe, assembly language programming, PowerBuilder, COBOL, Informix, Peoplesoft, Siebel)
• Unix is still a force, but not much demand for Mac development
  
• Dynamics is falling further behind
• Skills in popular platforms like Oracle, SAP, Java, C++/C#, and Unix/Linux are still in high demand, even in this weak economy
  

I'll post every once in a while on this topic, so please let me know if there are other skills I should track. Obviously, this is not likely to be a statistically valid sampling with a confidence level of +/-5%, and this should be a leading indicator (hiring) rather than a trailing or current indicator (number currently employed or employed in the past), but it is still illuminating data.

Here are some skills/terms, and the number of occurences of those terms (including alternative spellings) in job posts to Dice.com.

DATABASE
SQL	1159
Oracle	1774
SQL Server	415
DB2	127
MySQL	128
Sybase	79
Informix	15
PL/SQL	153
PowerBuilder	34
Applications
SAP	1942
Peoplesoft	575
Siebel	210
Salesforce.com	63
Dynamics	57
BASIS	140
ABAP	77
Languages
Java	2192
C#	829
C++	728
Perl	109
PHP	295
Python	65
Ruby	134
COBOL	91
FORTRAN	7
Assembler	20
Platforms
Windows	487
Linux	531
Unix	686
VMWare	95
Mac	32
Blackberry	45
iPhone	31
Palm	3
Android	25
Facebook	1
AJAX	59
Google	7
Yahoo	0
Widget	2
IBM	84
Mainframe	157
Embedded	240
Azure	0