.NET on Windows to Mono on Ubuntu

I am looking at a possibility to change my ASP.NET 2.0 application to the Mono framework. I have used the Mono Migration Analyzer tool and it does detect some P/Invoke and interop dependencies.

For example:

1) We use Excel开发者_StackOverflow中文版 interops and on Linux we are looking to use StarOffice/OpenOffice instead. Is there an easy way of substituting Excel with StarOffice? (I know it sounds bizarre, but I just don't want to miss out in case anyone has done it already.)

2) LDAP authentication: What could be the best alternative in Ubuntu (or an other flavour of Linux)?

3) Is there an Ajax framework for Mono? Preferably with similar controls as Atlas?

I hope I am not too ambitious here..

1) Yes, there is a Mono interop layer for OpenOffice. It's not very friendly, but it works.

2) If you just want to use LDAP from your app, there's a Novell.Directory.Ldap library shipped with Mono, and probably others available.

3) Mono includes ASP.NET AJAX. There are other libraries available such as Gaia AJAX.

Ok, found something for LDAP alternative in Linux - http://www.openldap.org/' alt="OpenLDAP">OpenLDAP. Would be helpful if someone could share the experiences of migrating roles and users from Windows Active Directory to OpenLDAP. And if anyone has used OpenLDAP in ASP.NET.