I have the same problem as you (many crash reports nad no time to process it).
I have prepared this idea for future processing:
1.collect crash reports by ACRA in to google docs
2.download this crash reports like xls sheet
3.run CrashReport aggregator over this sheet
4.result is new sheet with grouped and resolved crashs
Java program, which go trough each row in crash report sheet and resolve founded crashs from logcat by run adr2line as command in java code.
Each resolved crash log is compared with previous crashes and grouped to them or save as new.
Mayby its possible do this directly on server by java servlet and Google API.
This program is only in my head for this time. But for future its really necessenary.
Mayby we can collaborate?
PS: Are you able to receive logcat in BugSense? If I tried BugSence, I didnt find possibility to receive logCat data. Only java stack.