Hi Prasad,
1.Is struts2 is the latest version of Struts?
Yes and No. Struts1 (1.3.8) is also there and Struts2 is the new version using WebWork concept. You can look at the Struts web site for more details.
2.Also i want to know the market value of Struts2?Is any companies using this?
Many companies started migration to struts2 so market will be their.
3.I am new to Struts, can i directly starts with Struts2?
Yes, thats the best way to proceed.
Regards
Naveen