I never had any issues with Hadoop. Took about 2 days for me to familiarize myself with it and adhoc a script to do the staging and setup the local functions processing the data.
I really would like to understand what you consider "hard" about Hadoop or managing a cluster. It's pretty straight forward idea, architecture is dead simple, requiring no specialized hardware at any level. Anyone who is familiar with linux CLI and running a dyanamic website should be able to grok it easily, imho.
Then again, I come from the /. crowd, so YC isn't really my kind of people, generally.