LinkedIn mobile is for any Web enabled wireless phones that use the wireless application protocol (WAP). What that allows you to do is access LinkedIn from any mobile device ranging from your Blackberry to iPhone.
LinkedIn Mobile Features:
LinkedIn Mobile Search (iPhone)
Search LinkedIn profiles (including photos and bio) to help recall and connect with business acquaintances at events and conferences
LinkedIn Mobile Contacts (iPhone)
Research the common contacts they have with other professionals to help make real world referrals and introductions easier
LinkedIn Mobile Invite (iPhone)
Invite professional acquaintances and peers you meet at events to LinkedIn with just their email address. Exchanging business cards is just not cool anymore!
LinkedIn Mobile Network Updates (iPhone)
Receive regular Network update capabilities about your connections while on the go
LinkedIn Mobile Login in Chinese (iPhone)
International versions currently launched include French, German, Spanish, Japanese and Chinese. More to follow.