just a little hint theres an icon with installer underneath that tends to be a good start point lol
first thing I would suggest is go into installer then click on install (after sources refresh), scroll down to sources install community sources, if you want the mail,map, stock, weather and notes apps a good source to add is:
http://ipodtouched.net/repo.xml
to add a source in installer, click on the bottom right icon labeled sources, click edit then add and type the URL above in and click ok.
next when it has refreshed, click install icon on the bottom scroll down ti a category called ipod touched and install iphone apps + wiggle.
other programs that are useful are (these are already added when community sources is installed) bosstools to free up space (relocate fonts is normally enough), summerboard with customize 2.0 (changes the theme of the device)
there are also a selection of games on offer to download