I have found a decent list of installer sources, not tested any of these but the comments on the site I found it on were mainly positive. So here is a long list of sources to add to installer to widen the range of apps which are available to you (sources may be repeated as I have collected a list and pasted them in):
HighTymes: hightymes.org/iphone/plist/index.xml (Not Working)
iSwitcher: web.mac.com/iswitcher2/list.xml
Loring Studios: loringstudios.com/iPhone-schnapps/index.xml
BigBoss: markmon.mine.nu:90/iphone/repo/repo.plist
CedSoft: prog.cedsoft.free.fr (iSnake/Bounce)
Death to Design: iphone.deathtodesign.com
iApp-a-Day: iappaday.com/install
R4m0n: iphone.r4m0n.net/repos
Shai’s Apps: ride4.org/shai.xml (Customize Addons)
Slezak’s Stuff: www.spencerslezak.com (nothing on it yet)
Studded: studded.net/installer/index.xml
Surge: iphonesurge.com/iphonesurge.xml
Swell: lyndellwiggins.com/installer/Swell
AlohaSoft 1.0.2: homepage.mac.com/reinholdpenner/102.xml
AlohaSoft 1.1.1: homepage.mac.com/reinholdpenner/111.xml
AlohaSoft 1.1.2: homepage.mac.com/reinholdpenner/112.xml
aXP: lostsoul.aeroxp.org/iphone/index.xml
iBlackjack Beta: patrickmccarron.com/iphone/repo
Imagine09: home.twcny.rr.com/imagine09/Imagine09.xml
Mateo: bblk.net/iphone (BeatPhone)
Mobile Stacks: mobilestack.googlecode.com/svn/repository/internal.plist
MTL: home.mike.tl/iphone
This is a site which seems to have all of the sources you wil veer need: http://www.modmyifone.com/wiki/index.php/List_of_All_Rogue_Installer_Sources
