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@songs = {}
feed = RssParser.run("http://ws.audioscrobbler.com/1.0/user/me/recenttracks.rss")
feed[:items].each { |item| @songs[item[:title]] = item[:link] }

<ul id="lastfm_update_list">
	<% @songs.each do |title, link| %>			
		<li><%= link_to title, link %></li>
	<% end %>
</ul>

helper

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def extract source, number, attribute
  (0..(number-1)).inject(Array.new) do |result, index|
    result << source[index][attribute]
  end
end

controller

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feed = RssParser.run("http://ws.audioscrobbler.com/1.0/user/me/recenttracks.rss")
@songs = extract feed[:items], 3, :title
@links = extract feed[:items], 3, :link

view

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<ul id="lastfm_update_list">
	<% @songs.each_with_index do |song, count| %>			
		<li><%= link_to song, @links[count] %></li>
	<% end %>
</ul>

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# For the initial view, there's a better way to keep track of 'count'
# each_with_index is in Enumerable
<ul id="lastfm_update_list">
	<% @songs.each_with_index do |song, index| %>			
		<li><%= link_to song, @links[index] %></li>
	<% end %>
</ul>

# only extract the first 3 items with [0..2]
feed[:items][0..2].each do { |item| @songs[item[:title]] = item[:link] }