.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..

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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.

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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.