I have numerous thoughts about LinkedIn. I am kinda disappointed by it.
(I am a social software nerd, so no offense if anybody tunes out for this...)
I love the Internet. And LinkedIn is like 90% not taking advantage of the Internet. It's mostly a digital version of old school processes.
I know more people offered jobs via Twitter, Tumblr, Flickr, StackOverflow, HN than LinkedIn.
I guess this all goes back to "jobs offers/business deals happen because of relationships..." LinkedIn is basically bad at cultivating relationships/communities. It started out requiring symmetric (like Facebook) relationships, which i think has many bad side-effects. Also, despite doing it years before other good QA sites, their searchable, linkable questions/advice content is weak.
Relationships aside, for presenting work/history, things like about.me/Flavors.me, despite not being made to be resumes, are also promising. (here is stuff i MADE, here is stuff i've presented, here is stuff i've coded, here is a gallery of my work, etc).
Lately LinkedIn has been making OKCupid-esque cool use of all the data they have. I love the reports they're making. But i don't feel this is really being integrated into the user's experience of what it means to be a LI member. (It's more like these reports are a by-product.)
I hold out hope. But for how long they've been around, and how many users they have, and how basic the part of life they address is... LI really makes very little out of a giant opportunity + early advantage.
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Good luck on your current job hunt. I'm sure you'll get snatched up in no time. Ignore my LI rant. If it's working well for you, werq it. :-)