So you want to move your blog into Sitefinity, first you need to get your old blog data into a usable format. If by chance your old blog data was exported to the movable type format here is something that can be of help.
After using the movable type parser you can now import data into the blog. Next step is create a page that resides under the sitefinity/admin directory, call it something like BlogImporter.aspx.
In the newly created page in the Page_Load method handle the blog import. Yes this is not fancy or very reusable or dynamic but how many times are you going to import a blog?
15 protected void Page_Load(object sender, EventArgs e)
16 {
17 var fileContents = File.ReadAllText(@"C:\OldBlogDump\OldBlogExport.txt");
18
19 var oldPosts = MovableTypeParser.ParseMovableTypeContent(fileContents);
20
21 // create new instance of BlogManager
22 var blogManager = new BlogManager();
23 // get all blogs
24 var listOfAllBlogs = blogManager.GetBlogs();
25 if (listOfAllBlogs.Count > 0)
26 {
27 // get the first blog item
28 var firstBlog = blogManager.GetBlog(((IBlog)listOfAllBlogs[0]).ID);
29
30 foreach (OldPost oldPost in oldPosts)
31 {
32 // create a blog post by calling the CreateContent method of the
33 // ContentManager class through the BlogManager class
34 var postContent = blogManager.Content.CreateContent("text/html");
35
36 // set the parent of the post item to be firstBlog
37 postContent.ParentID = firstBlog.ID;
38
39 // save the Content property value and the Title meta key
40 postContent.Content = oldPost.Body;
41 postContent.SetMetaData("Title", oldPost.Title);
42 postContent.SetMetaData("Publication_Date", oldPost.Date);
43 //save the Content item through the BlogManager
44 blogManager.Content.SaveContent(postContent);
45 }
46 }
47
48 Response.Write("Import Finished!");
49 }
The import turned out to be pretty simple once I found everything I needed in documentation and other sources around the internet.