uses Jpeg;

...

var
 jpg: TJpegImage;
 Ms : TMemoryStream;
begin
 Ms := TMemoryStream.Create;
 jpg := TJpegImage.Create;
 
 HTTP.Get(''http://www.beeline.ru/'+s, Ms);
 Ms.Position := 0;
 Jpg.LoadFromStream(ms);
 Image1.Picture.Graphic := jpg;

 jpg.Free;
 Ms.Free;
end;