A small collection of Frequently Asked Questions about Aegisub - mostly stuff that didn't fit anywhere else.
See the Karaoke Templater tutorials.
Not directly, but there's a nifty program called MaestroSBT that can convert SSA to VOBSubs. It does have quite a bunch of restrictions on what tags and other things may be used, so reading its manual first is advised. Also note that it does not accept ASS - only SSA. You can use Aegisub's File -> Export… dialog to save real SSA files.
Yes, but only if it means that no information will be lost. In other words, if you have any override tags that aren't \1c, \b, or \i, Aegisub won't allow saving directly to SRT. However, you can still export to SRT by using the File -> Export… dialog box. Just uncheck all the checkboxes (clean script info, VFR transform etc.).
Report it on the bug tracker. Please include as many details as possible in your report! Remember that if a bug is not on the bug tracker, it does not exist as far as we are concerned.
Quite possibly because we didn't know you wanted it. Request it on the bug tracker and see what happens.
For Aegisub-related stuff, the forums and the IRC channel are good places to ask questions. The Aegisub devel wiki also contains some more obscure information not included in the manual for various reasons, and so does the forums. For general video-related questions, Doom9.org and its forums is generally the place to go.
In one word: yes.