Nothing that you posted is unexpected.
2009-08-29 14:43:43,687 INFO mojoPortal.Business.WebHelpers.IndexWriterTask - IndexWriter swallowed exception this is not unexpected if building or rebuilding the search index System.IO.FileNotFoundException: no segments* file
That error always happens when rebuilding the index because we delete the old files so it does not exist. It should log this error and then proceed to create the index. If other errors occur then there may be some other clues in the log if you have problems with search.
INFO messages are not errors either.
Best,
Joe