I've rolled out Splunk (http://www.splunk.com/) for log viewing and searching with great success. The free version can be used locally and the paid version can collect all your logs into one location. We use it mostly for Log4J logs but with lots of other formats as well.
Beyond tail and grep support (without needing to know grep...) it automatically indexes logs and allows easy analysis (e.g. # of events in last xx timeframe) as well as basic charting, alerting, and event aggregation.
I won't say that the app is perfect or that the company has matured yet. But I don't hesitate at all to recommend that you try it.
