I clicked a link in the connection dialog to the IQ toolkit and it launched IE. I suggest you use the default system browser.

include another .vb file(s) in a .linq file... perhaps a "#include aFile.linq" directive...
Will be a start point to use a library of classes or functions...

...like SQL Server Management Studio for example, so I can look at multiple code snippets and/or result sets side-by-side together, and so I can organize related stuff together when I'm using LINQPad for multiple projects at once.

It would be very nice if there was the single snippet IDE for LINQ, SQL and XSLT. Architag XRay XML Editor is good for XSLT, but just not as good (ergonomic) as LINQPad is for LINQ.

In the connection properties dialog, you could add a field for XmlMappingSource path and then use it to create the DataContext:

string xml = File.ReadAllText(pathToXmlMappingFile);

MappingSource mapping = XmlMappingSource.FromXml(xml);

DataContext context = new DataContext(connectionString, mapping);

I would like the to be able to see triggers that are on tables. In the same way that I can look at the definitions of SPs and functions.

In a .linq file there would be a reference to a config file. That file is loaded as the configuration for whatever runs in the file. This allows code to run that expect certain values in the config, such as anything from the Enterprise Library. It also ensures that the code you call does exactly the same an on a clients configuration.

Like Python and Ruby, this feature could be integrated with no pain. There is an hosting interface for boo. It's all about syntax coloring and intellisense.

How about supporting code creation with this two languages. It shouldn't be so hard, as it's now possible to host them inside of any .NET language. Its all about adding the syntax highlighting and intellisense.

LINQPad's results use the default ToString method. I would be excellent if you could register certain types to have a custom rendering.

Our SQL CE database does not use a standard extension. We use a custom one so we can associate it with our application. I can simply rename the file when I want to use LINQpad with it, but it would be much easier if I were allowed to open a file with any extension as a SQL CE database. I would also be able to use LINQpad to view that database while our application is running, which is sometimes necessary.

you're almost there -- give me the whole thing, baby!

One for server and the other for database. With many connections having only a single dropdown makes the list quite long and hard to navigate.

In the results panel, it would be useful to display the number of records returned by the query.

Automatically create entities based on synonyms just like it currently does for views and stored procedures.

In a C# app, my code is often:
DataClassesDataContext db = new DataClassesDataContext();

Then the Linq code is, for example
var results = from answer in db.Answers
where answer.Score > 20
select answer

Basically, this cannot be copied and pasted to / from LinqPad as the tables are in the DataContext. db. breaks linqPad / VS when it is copied back in.

Would be nice to be able to define the name of the DataContext globally (default), or for each query.